[ceph.git] / ceph / src / common / config_opts.h

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software
 * Foundation.  See file COPYING.
 *
 */

/* note: no header guard */
OPTION(host, OPT_STR, "") // "" means that ceph will use short hostname
OPTION(fsid, OPT_UUID, uuid_d())
OPTION(public_addr, OPT_ADDR, entity_addr_t())
OPTION(cluster_addr, OPT_ADDR, entity_addr_t())
OPTION(public_network, OPT_STR, "")
OPTION(cluster_network, OPT_STR, "")
OPTION(num_client, OPT_INT, 1)
OPTION(monmap, OPT_STR, "")
OPTION(mon_host, OPT_STR, "")
OPTION(mon_dns_srv_name, OPT_STR, "ceph-mon")
OPTION(lockdep, OPT_BOOL, false)
OPTION(lockdep_force_backtrace, OPT_BOOL, false) // always gather current backtrace at every lock
OPTION(run_dir, OPT_STR, "/var/run/ceph")       // the "/var/run/ceph" dir, created on daemon startup
OPTION(admin_socket, OPT_STR, "$run_dir/$cluster-$name.asok") // default changed by common_preinit()
OPTION(admin_socket_mode, OPT_STR, "") // permission bits to set for admin socket file, e.g., "0775", "0755"
OPTION(crushtool, OPT_STR, "crushtool") // crushtool utility path

OPTION(daemonize, OPT_BOOL, false) // default changed by common_preinit()
OPTION(setuser, OPT_STR, "")        // uid or user name
OPTION(setgroup, OPT_STR, "")        // gid or group name
OPTION(setuser_match_path, OPT_STR, "")  // make setuser/group conditional on this path matching ownership
OPTION(pid_file, OPT_STR, "") // default changed by common_preinit()
OPTION(chdir, OPT_STR, "/")
OPTION(max_open_files, OPT_LONGLONG, 0)
OPTION(restapi_log_level, OPT_STR, "")  // default set by Python code
OPTION(restapi_base_url, OPT_STR, "")   // "
OPTION(fatal_signal_handlers, OPT_BOOL, true)
SAFE_OPTION(erasure_code_dir, OPT_STR, CEPH_PKGLIBDIR"/erasure-code") // default location for erasure-code plugins

OPTION(log_file, OPT_STR, "/var/log/ceph/$cluster-$name.log") // default changed by common_preinit()
OPTION(log_max_new, OPT_INT, 1000) // default changed by common_preinit()
OPTION(log_max_recent, OPT_INT, 10000) // default changed by common_preinit()
OPTION(log_to_stderr, OPT_BOOL, true) // default changed by common_preinit()
OPTION(err_to_stderr, OPT_BOOL, true) // default changed by common_preinit()
OPTION(log_to_syslog, OPT_BOOL, false)
OPTION(err_to_syslog, OPT_BOOL, false)
OPTION(log_flush_on_exit, OPT_BOOL, true) // default changed by common_preinit()
OPTION(log_stop_at_utilization, OPT_FLOAT, .97)  // stop logging at (near) full
OPTION(log_to_graylog, OPT_BOOL, false)
OPTION(err_to_graylog, OPT_BOOL, false)
OPTION(log_graylog_host, OPT_STR, "127.0.0.1")
OPTION(log_graylog_port, OPT_INT, 12201)

// options will take k/v pairs, or single-item that will be assumed as general
// default for all, regardless of channel.
// e.g., "info" would be taken as the same as "default=info"
// also, "default=daemon audit=local0" would mean
//    "default all to 'daemon', override 'audit' with 'local0'
OPTION(clog_to_monitors, OPT_STR, "default=true")
OPTION(clog_to_syslog, OPT_STR, "false")
OPTION(clog_to_syslog_level, OPT_STR, "info") // this level and above
OPTION(clog_to_syslog_facility, OPT_STR, "default=daemon audit=local0")
OPTION(clog_to_graylog, OPT_STR, "false")
OPTION(clog_to_graylog_host, OPT_STR, "127.0.0.1")
OPTION(clog_to_graylog_port, OPT_STR, "12201")

OPTION(mon_cluster_log_to_syslog, OPT_STR, "default=false")
OPTION(mon_cluster_log_to_syslog_level, OPT_STR, "info")   // this level and above
OPTION(mon_cluster_log_to_syslog_facility, OPT_STR, "daemon")
OPTION(mon_cluster_log_file, OPT_STR,
    "default=/var/log/ceph/$cluster.$channel.log cluster=/var/log/ceph/$cluster.log")
OPTION(mon_cluster_log_file_level, OPT_STR, "info")
OPTION(mon_cluster_log_to_graylog, OPT_STR, "false")
OPTION(mon_cluster_log_to_graylog_host, OPT_STR, "127.0.0.1")
OPTION(mon_cluster_log_to_graylog_port, OPT_STR, "12201")

OPTION(enable_experimental_unrecoverable_data_corrupting_features, OPT_STR, "")

SAFE_OPTION(plugin_dir, OPT_STR, CEPH_PKGLIBDIR)

OPTION(xio_trace_mempool, OPT_BOOL, false) // mempool allocation counters
OPTION(xio_trace_msgcnt, OPT_BOOL, false) // incoming/outgoing msg counters
OPTION(xio_trace_xcon, OPT_BOOL, false) // Xio message encode/decode trace
OPTION(xio_queue_depth, OPT_INT, 128) // depth of Accelio msg queue
OPTION(xio_mp_min, OPT_INT, 128) // default min mempool size
OPTION(xio_mp_max_64, OPT_INT, 65536) // max 64-byte chunks (buffer is 40)
OPTION(xio_mp_max_256, OPT_INT, 8192) // max 256-byte chunks
OPTION(xio_mp_max_1k, OPT_INT, 8192) // max 1K chunks
OPTION(xio_mp_max_page, OPT_INT, 4096) // max 1K chunks
OPTION(xio_mp_max_hint, OPT_INT, 4096) // max size-hint chunks
OPTION(xio_portal_threads, OPT_INT, 2) // xio portal threads per messenger
OPTION(xio_max_conns_per_portal, OPT_INT, 32) // max xio_connections per portal/ctx
OPTION(xio_transport_type, OPT_STR, "rdma") // xio transport type: {rdma or tcp}
OPTION(xio_max_send_inline, OPT_INT, 512) // xio maximum threshold to send inline

OPTION(compressor_zlib_isal, OPT_BOOL, false)
OPTION(compressor_zlib_level, OPT_INT, 5) //regular zlib compression level, not applicable to isa-l optimized version

OPTION(async_compressor_enabled, OPT_BOOL, false)
OPTION(async_compressor_type, OPT_STR, "snappy")
OPTION(async_compressor_threads, OPT_INT, 2)
OPTION(async_compressor_thread_timeout, OPT_INT, 5)
OPTION(async_compressor_thread_suicide_timeout, OPT_INT, 30)

OPTION(plugin_crypto_accelerator, OPT_STR, "crypto_isal")

OPTION(mempool_debug, OPT_BOOL, false)

DEFAULT_SUBSYS(0, 5)
SUBSYS(lockdep, 0, 1)
SUBSYS(context, 0, 1)
SUBSYS(crush, 1, 1)
SUBSYS(mds, 1, 5)
SUBSYS(mds_balancer, 1, 5)
SUBSYS(mds_locker, 1, 5)
SUBSYS(mds_log, 1, 5)
SUBSYS(mds_log_expire, 1, 5)
SUBSYS(mds_migrator, 1, 5)
SUBSYS(buffer, 0, 1)
SUBSYS(timer, 0, 1)
SUBSYS(filer, 0, 1)
SUBSYS(striper, 0, 1)
SUBSYS(objecter, 0, 1)
SUBSYS(rados, 0, 5)
SUBSYS(rbd, 0, 5)
SUBSYS(rbd_mirror, 0, 5)
SUBSYS(rbd_replay, 0, 5)
SUBSYS(journaler, 0, 5)
SUBSYS(objectcacher, 0, 5)
SUBSYS(client, 0, 5)
SUBSYS(osd, 1, 5)
SUBSYS(optracker, 0, 5)
SUBSYS(objclass, 0, 5)
SUBSYS(filestore, 1, 3)
SUBSYS(journal, 1, 3)
SUBSYS(ms, 0, 5)
SUBSYS(mon, 1, 5)
SUBSYS(monc, 0, 10)
SUBSYS(paxos, 1, 5)
SUBSYS(tp, 0, 5)
SUBSYS(auth, 1, 5)
SUBSYS(crypto, 1, 5)
SUBSYS(finisher, 1, 1)
SUBSYS(heartbeatmap, 1, 5)
SUBSYS(perfcounter, 1, 5)
SUBSYS(rgw, 1, 5)                 // log level for the Rados gateway
SUBSYS(civetweb, 1, 10)
SUBSYS(javaclient, 1, 5)
SUBSYS(asok, 1, 5)
SUBSYS(throttle, 1, 1)
SUBSYS(refs, 0, 0)
SUBSYS(xio, 1, 5)
SUBSYS(compressor, 1, 5)
SUBSYS(bluestore, 1, 5)
SUBSYS(bluefs, 1, 5)
SUBSYS(bdev, 1, 3)
SUBSYS(kstore, 1, 5)
SUBSYS(rocksdb, 4, 5)
SUBSYS(leveldb, 4, 5)
SUBSYS(memdb, 4, 5)
SUBSYS(kinetic, 1, 5)
SUBSYS(fuse, 1, 5)
SUBSYS(mgr, 1, 5)
SUBSYS(mgrc, 1, 5)
SUBSYS(dpdk, 1, 5)
SUBSYS(eventtrace, 1, 5)

OPTION(key, OPT_STR, "")
OPTION(keyfile, OPT_STR, "")
OPTION(keyring, OPT_STR, 
    // default changed by common_preinit() for mds and osd
    "/etc/ceph/$cluster.$name.keyring,/etc/ceph/$cluster.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin," 
#if defined(__FreeBSD)
    "/usr/local/etc/ceph/$cluster.$name.keyring,/usr/local/etc/ceph/$cluster.keyring,"
    "/usr/local/etc/ceph/keyring,/usr/local/etc/ceph/keyring.bin," 
#endif
    )
OPTION(heartbeat_interval, OPT_INT, 5)
OPTION(heartbeat_file, OPT_STR, "")
OPTION(heartbeat_inject_failure, OPT_INT, 0)    // force an unhealthy heartbeat for N seconds
OPTION(perf, OPT_BOOL, true)       // enable internal perf counters

SAFE_OPTION(ms_type, OPT_STR, "async+posix")   // messenger backend. It will be modified in runtime, so use SAFE_OPTION
OPTION(ms_public_type, OPT_STR, "")   // messenger backend
OPTION(ms_cluster_type, OPT_STR, "")   // messenger backend
OPTION(ms_tcp_nodelay, OPT_BOOL, true)
OPTION(ms_tcp_rcvbuf, OPT_INT, 0)
OPTION(ms_tcp_prefetch_max_size, OPT_INT, 4096) // max prefetch size, we limit this to avoid extra memcpy
OPTION(ms_initial_backoff, OPT_DOUBLE, .2)
OPTION(ms_max_backoff, OPT_DOUBLE, 15.0)
OPTION(ms_crc_data, OPT_BOOL, true)
OPTION(ms_crc_header, OPT_BOOL, true)
OPTION(ms_die_on_bad_msg, OPT_BOOL, false)
OPTION(ms_die_on_unhandled_msg, OPT_BOOL, false)
OPTION(ms_die_on_old_message, OPT_BOOL, false)     // assert if we get a dup incoming message and shouldn't have (may be triggered by pre-541cd3c64be0dfa04e8a2df39422e0eb9541a428 code)
OPTION(ms_die_on_skipped_message, OPT_BOOL, false)  // assert if we skip a seq (kernel client does this intentionally)
OPTION(ms_dispatch_throttle_bytes, OPT_U64, 100 << 20)
OPTION(ms_bind_ipv6, OPT_BOOL, false)
OPTION(ms_bind_port_min, OPT_INT, 6800)
OPTION(ms_bind_port_max, OPT_INT, 7300)
#if !defined(__FreeBSD__)
OPTION(ms_bind_retry_count, OPT_INT, 3) // If binding fails, how many times do we retry to bind
OPTION(ms_bind_retry_delay, OPT_INT, 5) // Delay between attemps to bind
#else
// FreeBSD does not use SO_REAUSEADDR so allow for a bit more time per default
OPTION(ms_bind_retry_count, OPT_INT, 6) // If binding fails, how many times do we retry to bind
OPTION(ms_bind_retry_delay, OPT_INT, 6) // Delay between attemps to bind
#endif
OPTION(ms_bind_before_connect, OPT_BOOL, false)
OPTION(ms_rwthread_stack_bytes, OPT_U64, 1024 << 10)
OPTION(ms_tcp_read_timeout, OPT_U64, 900)
OPTION(ms_pq_max_tokens_per_priority, OPT_U64, 16777216)
OPTION(ms_pq_min_cost, OPT_U64, 65536)
OPTION(ms_inject_socket_failures, OPT_U64, 0)
SAFE_OPTION(ms_inject_delay_type, OPT_STR, "")          // "osd mds mon client" allowed
OPTION(ms_inject_delay_msg_type, OPT_STR, "")      // the type of message to delay, as returned by Message::get_type_name(). This is an additional restriction on the general type filter ms_inject_delay_type.
OPTION(ms_inject_delay_max, OPT_DOUBLE, 1)         // seconds
OPTION(ms_inject_delay_probability, OPT_DOUBLE, 0) // range [0, 1]
OPTION(ms_inject_internal_delays, OPT_DOUBLE, 0)   // seconds
OPTION(ms_dump_on_send, OPT_BOOL, false)           // hexdump msg to log on send
OPTION(ms_dump_corrupt_message_level, OPT_INT, 1)  // debug level to hexdump undecodeable messages at
OPTION(ms_async_op_threads, OPT_U64, 3)            // number of worker processing threads for async messenger created on init
OPTION(ms_async_max_op_threads, OPT_U64, 5)        // max number of worker processing threads for async messenger
OPTION(ms_async_set_affinity, OPT_BOOL, true)
// example: ms_async_affinity_cores = 0,1
// The number of coreset is expected to equal to ms_async_op_threads, otherwise
// extra op threads will loop ms_async_affinity_cores again.
// If ms_async_affinity_cores is empty, all threads will be bind to current running
// core
OPTION(ms_async_affinity_cores, OPT_STR, "")
OPTION(ms_async_rdma_device_name, OPT_STR, "")
OPTION(ms_async_rdma_enable_hugepage, OPT_BOOL, false)
OPTION(ms_async_rdma_buffer_size, OPT_INT, 128 << 10)
OPTION(ms_async_rdma_send_buffers, OPT_U32, 1024)
OPTION(ms_async_rdma_receive_buffers, OPT_U32, 1024)
OPTION(ms_async_rdma_port_num, OPT_U32, 1)
OPTION(ms_async_rdma_polling_us, OPT_U32, 1000)
OPTION(ms_async_rdma_local_gid, OPT_STR, "")       // GID format: "fe80:0000:0000:0000:7efe:90ff:fe72:6efe", no zero folding
OPTION(ms_async_rdma_roce_ver, OPT_INT, 1)         // 0=RoCEv1, 1=RoCEv2, 2=RoCEv1.5
OPTION(ms_async_rdma_sl, OPT_INT, 3)               // in RoCE, this means PCP
OPTION(ms_async_rdma_dscp, OPT_INT, 96)            // in RoCE, this means DSCP

OPTION(ms_dpdk_port_id, OPT_INT, 0)
SAFE_OPTION(ms_dpdk_coremask, OPT_STR, "1")        // it is modified in unittest so that use SAFE_OPTION to declare 
OPTION(ms_dpdk_memory_channel, OPT_STR, "4")
OPTION(ms_dpdk_hugepages, OPT_STR, "")
OPTION(ms_dpdk_pmd, OPT_STR, "")
SAFE_OPTION(ms_dpdk_host_ipv4_addr, OPT_STR, "")
SAFE_OPTION(ms_dpdk_gateway_ipv4_addr, OPT_STR, "")
SAFE_OPTION(ms_dpdk_netmask_ipv4_addr, OPT_STR, "")
OPTION(ms_dpdk_lro, OPT_BOOL, true)
OPTION(ms_dpdk_hw_flow_control, OPT_BOOL, true)
// Weighing of a hardware network queue relative to a software queue (0=no work, 1=     equal share)")
OPTION(ms_dpdk_hw_queue_weight, OPT_FLOAT, 1)
OPTION(ms_dpdk_debug_allow_loopback, OPT_BOOL, false)
OPTION(ms_dpdk_rx_buffer_count_per_core, OPT_INT, 8192)

OPTION(inject_early_sigterm, OPT_BOOL, false)

OPTION(mon_data, OPT_STR, "/var/lib/ceph/mon/$cluster-$id")
OPTION(mon_initial_members, OPT_STR, "")    // list of initial cluster mon ids; if specified, need majority to form initial quorum and create new cluster
OPTION(mon_compact_on_start, OPT_BOOL, false)  // compact leveldb on ceph-mon start
OPTION(mon_compact_on_bootstrap, OPT_BOOL, false)  // trigger leveldb compaction on bootstrap
OPTION(mon_compact_on_trim, OPT_BOOL, true)       // compact (a prefix) when we trim old states
OPTION(mon_osd_cache_size, OPT_INT, 10)  // the size of osdmaps cache, not to rely on underlying store's cache

OPTION(mon_cpu_threads, OPT_INT, 4)
OPTION(mon_osd_mapping_pgs_per_chunk, OPT_INT, 4096)
OPTION(mon_osd_max_creating_pgs, OPT_INT, 1024)
OPTION(mon_tick_interval, OPT_INT, 5)
OPTION(mon_session_timeout, OPT_INT, 300)    // must send keepalive or subscribe
OPTION(mon_subscribe_interval, OPT_DOUBLE, 24*3600)  // for legacy clients only
OPTION(mon_delta_reset_interval, OPT_DOUBLE, 10)   // seconds of inactivity before we reset the pg delta to 0
OPTION(mon_osd_laggy_halflife, OPT_INT, 60*60)        // (seconds) how quickly our laggy estimations decay
OPTION(mon_osd_laggy_weight, OPT_DOUBLE, .3)          // weight for new 'samples's in laggy estimations
OPTION(mon_osd_laggy_max_interval, OPT_INT, 300)      // maximum value of laggy_interval in laggy estimations
OPTION(mon_osd_adjust_heartbeat_grace, OPT_BOOL, true)    // true if we should scale based on laggy estimations
OPTION(mon_osd_adjust_down_out_interval, OPT_BOOL, true)  // true if we should scale based on laggy estimations
OPTION(mon_osd_auto_mark_in, OPT_BOOL, false)         // mark any booting osds 'in'
OPTION(mon_osd_auto_mark_auto_out_in, OPT_BOOL, true) // mark booting auto-marked-out osds 'in'
OPTION(mon_osd_auto_mark_new_in, OPT_BOOL, true)      // mark booting new osds 'in'
OPTION(mon_osd_down_out_interval, OPT_INT, 600) // seconds
OPTION(mon_osd_down_out_subtree_limit, OPT_STR, "rack")   // smallest crush unit/type that we will not automatically mark out
OPTION(mon_osd_min_up_ratio, OPT_DOUBLE, .3)    // min osds required to be up to mark things down
OPTION(mon_osd_min_in_ratio, OPT_DOUBLE, .75)   // min osds required to be in to mark things out
OPTION(mon_osd_warn_op_age, OPT_DOUBLE, 32)     // max op age before we generate a warning (make it a power of 2)
OPTION(mon_osd_err_op_age_ratio, OPT_DOUBLE, 128)  // when to generate an error, as multiple of mon_osd_warn_op_age
OPTION(mon_osd_max_split_count, OPT_INT, 32) // largest number of PGs per "involved" OSD to let split create
OPTION(mon_osd_allow_primary_temp, OPT_BOOL, false)  // allow primary_temp to be set in the osdmap
OPTION(mon_osd_allow_primary_affinity, OPT_BOOL, false)  // allow primary_affinity to be set in the osdmap
OPTION(mon_osd_prime_pg_temp, OPT_BOOL, true)  // prime osdmap with pg mapping changes
OPTION(mon_osd_prime_pg_temp_max_time, OPT_FLOAT, .5)  // max time to spend priming
OPTION(mon_osd_prime_pg_temp_max_estimate, OPT_FLOAT, .25) // max estimate of pg total before we do all pgs in parallel
OPTION(mon_osd_pool_ec_fast_read, OPT_BOOL, false) // whether turn on fast read on the pool or not
OPTION(mon_stat_smooth_intervals, OPT_INT, 6)  // smooth stats over last N PGMap maps
OPTION(mon_election_timeout, OPT_FLOAT, 5)  // on election proposer, max waiting time for all ACKs
OPTION(mon_lease, OPT_FLOAT, 5)       // lease interval
OPTION(mon_lease_renew_interval_factor, OPT_FLOAT, .6) // on leader, to renew the lease
OPTION(mon_lease_ack_timeout_factor, OPT_FLOAT, 2.0) // on leader, if lease isn't acked by all peons
OPTION(mon_accept_timeout_factor, OPT_FLOAT, 2.0)    // on leader, if paxos update isn't accepted

OPTION(mon_clock_drift_allowed, OPT_FLOAT, .050) // allowed clock drift between monitors
OPTION(mon_clock_drift_warn_backoff, OPT_FLOAT, 5) // exponential backoff for clock drift warnings
OPTION(mon_timecheck_interval, OPT_FLOAT, 300.0) // on leader, timecheck (clock drift check) interval (seconds)
OPTION(mon_timecheck_skew_interval, OPT_FLOAT, 30.0) // on leader, timecheck (clock drift check) interval when in presence of a skew (seconds)
OPTION(mon_pg_stuck_threshold, OPT_INT, 300) // number of seconds after which pgs can be considered inactive, unclean, or stale (see doc/control.rst under dump_stuck for more info)
OPTION(mon_health_max_detail, OPT_INT, 50) // max detailed pgs to report in health detail
OPTION(mon_pg_min_inactive, OPT_U64, 1) // the number of PGs which have to be inactive longer than 'mon_pg_stuck_threshold' before health goes into ERR. 0 means disabled, never go into ERR.
OPTION(mon_pg_warn_min_per_osd, OPT_INT, 30)  // min # pgs per (in) osd before we warn the admin
OPTION(mon_pg_warn_max_per_osd, OPT_INT, 300)  // max # pgs per (in) osd before we warn the admin
OPTION(mon_pg_warn_max_object_skew, OPT_FLOAT, 10.0) // max skew few average in objects per pg
OPTION(mon_pg_warn_min_objects, OPT_INT, 10000)  // do not warn below this object #
OPTION(mon_pg_warn_min_pool_objects, OPT_INT, 1000)  // do not warn on pools below this object #
OPTION(mon_pg_check_down_all_threshold, OPT_FLOAT, .5) // threshold of down osds after which we check all pgs
OPTION(mon_cache_target_full_warn_ratio, OPT_FLOAT, .66) // position between pool cache_target_full and max where we start warning
OPTION(mon_osd_full_ratio, OPT_FLOAT, .95) // what % full makes an OSD "full"
OPTION(mon_osd_backfillfull_ratio, OPT_FLOAT, .90) // what % full makes an OSD backfill full (backfill halted)
OPTION(mon_osd_nearfull_ratio, OPT_FLOAT, .85) // what % full makes an OSD near full
OPTION(mon_osd_initial_require_min_compat_client, OPT_STR, "jewel")
OPTION(mon_allow_pool_delete, OPT_BOOL, false) // allow pool deletion
OPTION(mon_fake_pool_delete, OPT_BOOL, false)  // fake pool deletion (add _DELETED suffix)
OPTION(mon_globalid_prealloc, OPT_U32, 10000)   // how many globalids to prealloc
OPTION(mon_osd_report_timeout, OPT_INT, 900)    // grace period before declaring unresponsive OSDs dead
OPTION(mon_force_standby_active, OPT_BOOL, true) // should mons force standby-replay mds to be active
OPTION(mon_warn_on_legacy_crush_tunables, OPT_BOOL, true) // warn if crush tunables are too old (older than mon_min_crush_required_version)
OPTION(mon_crush_min_required_version, OPT_STR, "firefly")
OPTION(mon_warn_on_crush_straw_calc_version_zero, OPT_BOOL, true) // warn if crush straw_calc_version==0
OPTION(mon_warn_on_osd_down_out_interval_zero, OPT_BOOL, true) // warn if 'mon_osd_down_out_interval == 0'
OPTION(mon_warn_on_cache_pools_without_hit_sets, OPT_BOOL, true)
OPTION(mon_warn_osd_usage_min_max_delta, OPT_FLOAT, .40) // warn if difference between min and max OSD utilizations exceeds specified amount
OPTION(mon_min_osdmap_epochs, OPT_INT, 500)
OPTION(mon_max_pgmap_epochs, OPT_INT, 500)
OPTION(mon_max_log_epochs, OPT_INT, 500)
OPTION(mon_max_mdsmap_epochs, OPT_INT, 500)
OPTION(mon_max_osd, OPT_INT, 10000)
OPTION(mon_probe_timeout, OPT_DOUBLE, 2.0)
OPTION(mon_client_bytes, OPT_U64, 100ul << 20)  // client msg data allowed in memory (in bytes)
OPTION(mon_mgr_proxy_client_bytes_ratio, OPT_FLOAT, .3) // ratio of mon_client_bytes that can be consumed by proxied mgr commands before we error out to client
OPTION(mon_log_max_summary, OPT_U64, 50)
OPTION(mon_daemon_bytes, OPT_U64, 400ul << 20)  // mds, osd message memory cap (in bytes)
OPTION(mon_max_log_entries_per_event, OPT_INT, 4096)
OPTION(mon_reweight_min_pgs_per_osd, OPT_U64, 10)   // min pgs per osd for reweight-by-pg command
OPTION(mon_reweight_min_bytes_per_osd, OPT_U64, 100*1024*1024)   // min bytes per osd for reweight-by-utilization command
OPTION(mon_reweight_max_osds, OPT_INT, 4)   // max osds to change per reweight-by-* command
OPTION(mon_reweight_max_change, OPT_DOUBLE, 0.05)
OPTION(mon_health_data_update_interval, OPT_FLOAT, 60.0)
OPTION(mon_health_to_clog, OPT_BOOL, true)
OPTION(mon_health_to_clog_interval, OPT_INT, 3600)
OPTION(mon_health_to_clog_tick_interval, OPT_DOUBLE, 60.0)
OPTION(mon_data_avail_crit, OPT_INT, 5)
OPTION(mon_data_avail_warn, OPT_INT, 30)
OPTION(mon_data_size_warn, OPT_U64, 15*1024*1024*1024) // issue a warning when the monitor's data store goes over 15GB (in bytes)
OPTION(mon_warn_not_scrubbed, OPT_INT, 0)
OPTION(mon_warn_not_deep_scrubbed, OPT_INT, 0)
OPTION(mon_scrub_interval, OPT_INT, 3600*24) // once a day
OPTION(mon_scrub_timeout, OPT_INT, 60*5) // let's give it 5 minutes; why not.
OPTION(mon_scrub_max_keys, OPT_INT, 100) // max number of keys to scrub each time
OPTION(mon_scrub_inject_crc_mismatch, OPT_DOUBLE, 0.0) // probability of injected crc mismatch [0.0, 1.0]
OPTION(mon_scrub_inject_missing_keys, OPT_DOUBLE, 0.0) // probability of injected missing keys [0.0, 1.0]
OPTION(mon_config_key_max_entry_size, OPT_INT, 4096) // max num bytes per config-key entry
OPTION(mon_sync_timeout, OPT_DOUBLE, 60.0)
OPTION(mon_sync_max_payload_size, OPT_U32, 1048576) // max size for a sync chunk payload (say, 1MB)
OPTION(mon_sync_debug, OPT_BOOL, false) // enable sync-specific debug
OPTION(mon_inject_sync_get_chunk_delay, OPT_DOUBLE, 0)  // inject N second delay on each get_chunk request
OPTION(mon_osd_min_down_reporters, OPT_INT, 2)   // number of OSDs from different subtrees who need to report a down OSD for it to count
OPTION(mon_osd_reporter_subtree_level , OPT_STR, "host")   // in which level of parent bucket the reporters are counted
OPTION(mon_osd_force_trim_to, OPT_INT, 0)   // force mon to trim maps to this point, regardless of min_last_epoch_clean (dangerous, use with care)
OPTION(mon_mds_force_trim_to, OPT_INT, 0)   // force mon to trim mdsmaps to this point (dangerous, use with care)
OPTION(mon_mds_skip_sanity, OPT_BOOL, false)  // skip safety assertions on FSMap (in case of bugs where we want to continue anyway)

// monitor debug options
OPTION(mon_debug_deprecated_as_obsolete, OPT_BOOL, false) // consider deprecated commands as obsolete

// dump transactions
OPTION(mon_debug_dump_transactions, OPT_BOOL, false)
OPTION(mon_debug_dump_json, OPT_BOOL, false)
OPTION(mon_debug_dump_location, OPT_STR, "/var/log/ceph/$cluster-$name.tdump")
OPTION(mon_debug_no_require_luminous, OPT_BOOL, false)
OPTION(mon_debug_no_require_bluestore_for_ec_overwrites, OPT_BOOL, false)
OPTION(mon_debug_no_initial_persistent_features, OPT_BOOL, false)
OPTION(mon_inject_transaction_delay_max, OPT_DOUBLE, 10.0)      // seconds
OPTION(mon_inject_transaction_delay_probability, OPT_DOUBLE, 0) // range [0, 1]

OPTION(mon_sync_provider_kill_at, OPT_INT, 0)  // kill the sync provider at a specific point in the work flow
OPTION(mon_sync_requester_kill_at, OPT_INT, 0) // kill the sync requester at a specific point in the work flow
OPTION(mon_force_quorum_join, OPT_BOOL, false) // force monitor to join quorum even if it has been previously removed from the map
OPTION(mon_keyvaluedb, OPT_STR, "rocksdb")   // type of keyvaluedb backend

// UNSAFE -- TESTING ONLY! Allows addition of a cache tier with preexisting snaps
OPTION(mon_debug_unsafe_allow_tier_with_nonempty_snaps, OPT_BOOL, false)

OPTION(paxos_stash_full_interval, OPT_INT, 25)   // how often (in commits) to stash a full copy of the PaxosService state
OPTION(paxos_max_join_drift, OPT_INT, 10) // max paxos iterations before we must first sync the monitor stores
OPTION(paxos_propose_interval, OPT_DOUBLE, 1.0)  // gather updates for this long before proposing a map update
OPTION(paxos_min_wait, OPT_DOUBLE, 0.05)  // min time to gather updates for after period of inactivity
OPTION(paxos_min, OPT_INT, 500)       // minimum number of paxos states to keep around
OPTION(paxos_trim_min, OPT_INT, 250)  // number of extra proposals tolerated before trimming
OPTION(paxos_trim_max, OPT_INT, 500) // max number of extra proposals to trim at a time
OPTION(paxos_service_trim_min, OPT_INT, 250) // minimum amount of versions to trigger a trim (0 disables it)
OPTION(paxos_service_trim_max, OPT_INT, 500) // maximum amount of versions to trim during a single proposal (0 disables it)
OPTION(paxos_kill_at, OPT_INT, 0)
OPTION(auth_cluster_required, OPT_STR, "cephx")   // required of mon, mds, osd daemons
OPTION(auth_service_required, OPT_STR, "cephx")   // required by daemons of clients
OPTION(auth_client_required, OPT_STR, "cephx, none")     // what clients require of daemons
OPTION(auth_supported, OPT_STR, "")               // deprecated; default value for above if they are not defined.
OPTION(max_rotating_auth_attempts, OPT_INT, 10)
OPTION(cephx_require_signatures, OPT_BOOL, false) //  If true, don't talk to Cephx partners if they don't support message signing; off by default
OPTION(cephx_cluster_require_signatures, OPT_BOOL, false)
OPTION(cephx_service_require_signatures, OPT_BOOL, false)
OPTION(cephx_sign_messages, OPT_BOOL, true)  // Default to signing session messages if supported
OPTION(auth_mon_ticket_ttl, OPT_DOUBLE, 60*60*12)
OPTION(auth_service_ticket_ttl, OPT_DOUBLE, 60*60)
OPTION(auth_debug, OPT_BOOL, false)          // if true, assert when weird things happen
OPTION(mon_client_hunt_parallel, OPT_U32, 2)   // how many mons to try to connect to in parallel during hunt
OPTION(mon_client_hunt_interval, OPT_DOUBLE, 3.0)   // try new mon every N seconds until we connect
OPTION(mon_client_ping_interval, OPT_DOUBLE, 10.0)  // ping every N seconds
OPTION(mon_client_ping_timeout, OPT_DOUBLE, 30.0)   // fail if we don't hear back
OPTION(mon_client_hunt_interval_backoff, OPT_DOUBLE, 2.0) // each time we reconnect to a monitor, double our timeout
OPTION(mon_client_hunt_interval_max_multiple, OPT_DOUBLE, 10.0) // up to a max of 10*default (30 seconds)
OPTION(mon_client_max_log_entries_per_message, OPT_INT, 1000)
OPTION(mon_max_pool_pg_num, OPT_INT, 65536)
OPTION(mon_pool_quota_warn_threshold, OPT_INT, 0) // percent of quota at which to issue warnings
OPTION(mon_pool_quota_crit_threshold, OPT_INT, 0) // percent of quota at which to issue errors
OPTION(client_cache_size, OPT_INT, 16384)
OPTION(client_cache_mid, OPT_FLOAT, .75)
OPTION(client_use_random_mds, OPT_BOOL, false)
OPTION(client_mount_timeout, OPT_DOUBLE, 300.0)
OPTION(client_tick_interval, OPT_DOUBLE, 1.0)
OPTION(client_trace, OPT_STR, "")
OPTION(client_readahead_min, OPT_LONGLONG, 128*1024)  // readahead at _least_ this much.
OPTION(client_readahead_max_bytes, OPT_LONGLONG, 0)  // default unlimited
OPTION(client_readahead_max_periods, OPT_LONGLONG, 4)  // as multiple of file layout period (object size * num stripes)
OPTION(client_reconnect_stale, OPT_BOOL, false)  // automatically reconnect stale session
OPTION(client_snapdir, OPT_STR, ".snap")
OPTION(client_mountpoint, OPT_STR, "/")
OPTION(client_mount_uid, OPT_INT, -1)
OPTION(client_mount_gid, OPT_INT, -1)
OPTION(client_notify_timeout, OPT_INT, 10) // in seconds
OPTION(osd_client_watch_timeout, OPT_INT, 30) // in seconds
OPTION(client_caps_release_delay, OPT_INT, 5) // in seconds
OPTION(client_quota_df, OPT_BOOL, true) // use quota for df on subdir mounts
OPTION(client_oc, OPT_BOOL, true)
OPTION(client_oc_size, OPT_INT, 1024*1024* 200)    // MB * n
OPTION(client_oc_max_dirty, OPT_INT, 1024*1024* 100)    // MB * n  (dirty OR tx.. bigish)
OPTION(client_oc_target_dirty, OPT_INT, 1024*1024* 8) // target dirty (keep this smallish)
OPTION(client_oc_max_dirty_age, OPT_DOUBLE, 5.0)      // max age in cache before writeback
OPTION(client_oc_max_objects, OPT_INT, 1000)      // max objects in cache
OPTION(client_debug_getattr_caps, OPT_BOOL, false) // check if MDS reply contains wanted caps
OPTION(client_debug_force_sync_read, OPT_BOOL, false)     // always read synchronously (go to osds)
OPTION(client_debug_inject_tick_delay, OPT_INT, 0) // delay the client tick for a number of seconds
OPTION(client_max_inline_size, OPT_U64, 4096)
OPTION(client_inject_release_failure, OPT_BOOL, false)  // synthetic client bug for testing
OPTION(client_inject_fixed_oldest_tid, OPT_BOOL, false)  // synthetic client bug for testing
OPTION(client_metadata, OPT_STR, "")
OPTION(client_acl_type, OPT_STR, "")
OPTION(client_permissions, OPT_BOOL, true)
OPTION(client_dirsize_rbytes, OPT_BOOL, true)

// note: the max amount of "in flight" dirty data is roughly (max - target)
OPTION(fuse_use_invalidate_cb, OPT_BOOL, true) // use fuse 2.8+ invalidate callback to keep page cache consistent
OPTION(fuse_disable_pagecache, OPT_BOOL, false)
OPTION(fuse_allow_other, OPT_BOOL, true)
OPTION(fuse_default_permissions, OPT_BOOL, false)
OPTION(fuse_big_writes, OPT_BOOL, true)
OPTION(fuse_atomic_o_trunc, OPT_BOOL, true)
OPTION(fuse_debug, OPT_BOOL, false)
OPTION(fuse_multithreaded, OPT_BOOL, true)
OPTION(fuse_require_active_mds, OPT_BOOL, true) // if ceph_fuse requires active mds server
OPTION(fuse_syncfs_on_mksnap, OPT_BOOL, true)
OPTION(fuse_set_user_groups, OPT_BOOL, false) // if ceph_fuse fills in group lists or not

OPTION(client_try_dentry_invalidate, OPT_BOOL, true) // the client should try to use dentry invaldation instead of remounting, on kernels it believes that will work for
OPTION(client_die_on_failed_remount, OPT_BOOL, true)
OPTION(client_check_pool_perm, OPT_BOOL, true)
OPTION(client_use_faked_inos, OPT_BOOL, false)
OPTION(client_mds_namespace, OPT_STR, "")

OPTION(crush_location, OPT_STR, "")       // whitespace-separated list of key=value pairs describing crush location
OPTION(crush_location_hook, OPT_STR, "")
OPTION(crush_location_hook_timeout, OPT_INT, 10)

OPTION(objecter_tick_interval, OPT_DOUBLE, 5.0)
OPTION(objecter_timeout, OPT_DOUBLE, 10.0)    // before we ask for a map
OPTION(objecter_inflight_op_bytes, OPT_U64, 1024*1024*100) // max in-flight data (both directions)
OPTION(objecter_inflight_ops, OPT_U64, 1024)               // max in-flight ios
OPTION(objecter_completion_locks_per_session, OPT_U64, 32) // num of completion locks per each session, for serializing same object responses
OPTION(objecter_inject_no_watch_ping, OPT_BOOL, false)   // suppress watch pings
OPTION(objecter_retry_writes_after_first_reply, OPT_BOOL, false)   // ignore the first reply for each write, and resend the osd op instead
OPTION(objecter_debug_inject_relock_delay, OPT_BOOL, false)

// Max number of deletes at once in a single Filer::purge call
OPTION(filer_max_purge_ops, OPT_U32, 10)
// Max number of truncate at once in a single Filer::truncate call
OPTION(filer_max_truncate_ops, OPT_U32, 128)

OPTION(journaler_write_head_interval, OPT_INT, 15)
OPTION(journaler_prefetch_periods, OPT_INT, 10)   // * journal object size
OPTION(journaler_prezero_periods, OPT_INT, 5)     // * journal object size
OPTION(mds_data, OPT_STR, "/var/lib/ceph/mds/$cluster-$id")
OPTION(mds_max_file_size, OPT_U64, 1ULL << 40) // Used when creating new CephFS. Change with 'ceph mds set max_file_size <size>' afterwards
// max xattr kv pairs size for each dir/file
OPTION(mds_max_xattr_pairs_size, OPT_U32, 64 << 10)
OPTION(mds_cache_size, OPT_INT, 100000)
OPTION(mds_cache_mid, OPT_FLOAT, .7)
OPTION(mds_max_file_recover, OPT_U32, 32)
OPTION(mds_dir_max_commit_size, OPT_INT, 10) // MB
OPTION(mds_dir_keys_per_op, OPT_INT, 16384)
OPTION(mds_decay_halflife, OPT_FLOAT, 5)
OPTION(mds_beacon_interval, OPT_FLOAT, 4)
OPTION(mds_beacon_grace, OPT_FLOAT, 15)
OPTION(mds_enforce_unique_name, OPT_BOOL, true)
OPTION(mds_blacklist_interval, OPT_FLOAT, 24.0*60.0)  // how long to blacklist failed nodes

OPTION(mds_session_timeout, OPT_FLOAT, 60)    // cap bits and leases time out if client idle
OPTION(mds_session_blacklist_on_timeout, OPT_BOOL, true)    // whether to blacklist clients whose sessions are dropped due to timeout
OPTION(mds_session_blacklist_on_evict, OPT_BOOL, true)  // whether to blacklist clients whose sessions are dropped via admin commands

OPTION(mds_sessionmap_keys_per_op, OPT_U32, 1024)    // how many sessions should I try to load/store in a single OMAP operation?
OPTION(mds_revoke_cap_timeout, OPT_FLOAT, 60)    // detect clients which aren't revoking caps
OPTION(mds_recall_state_timeout, OPT_FLOAT, 60)    // detect clients which aren't trimming caps
OPTION(mds_freeze_tree_timeout, OPT_FLOAT, 30)    // detecting freeze tree deadlock
OPTION(mds_session_autoclose, OPT_FLOAT, 300) // autoclose idle session
OPTION(mds_health_summarize_threshold, OPT_INT, 10) // collapse N-client health metrics to a single 'many'
OPTION(mds_health_cache_threshold, OPT_FLOAT, 1.5) // warn on cache size if it exceeds mds_cache_size by this factor
OPTION(mds_reconnect_timeout, OPT_FLOAT, 45)  // seconds to wait for clients during mds restart
              //  make it (mds_session_timeout - mds_beacon_grace)
OPTION(mds_tick_interval, OPT_FLOAT, 5)
OPTION(mds_dirstat_min_interval, OPT_FLOAT, 1)    // try to avoid propagating more often than this
OPTION(mds_scatter_nudge_interval, OPT_FLOAT, 5)  // how quickly dirstat changes propagate up the hierarchy
OPTION(mds_client_prealloc_inos, OPT_INT, 1000)
OPTION(mds_early_reply, OPT_BOOL, true)
OPTION(mds_default_dir_hash, OPT_INT, CEPH_STR_HASH_RJENKINS)
OPTION(mds_log_pause, OPT_BOOL, false)
OPTION(mds_log_skip_corrupt_events, OPT_BOOL, false)
OPTION(mds_log_max_events, OPT_INT, -1)
OPTION(mds_log_events_per_segment, OPT_INT, 1024)
OPTION(mds_log_segment_size, OPT_INT, 0)  // segment size for mds log, default to default file_layout_t
OPTION(mds_log_max_segments, OPT_U32, 30)
OPTION(mds_log_max_expiring, OPT_INT, 20)
OPTION(mds_bal_export_pin, OPT_BOOL, true)  // allow clients to pin directory trees to ranks
OPTION(mds_bal_sample_interval, OPT_DOUBLE, 3.0)  // every 3 seconds
OPTION(mds_bal_replicate_threshold, OPT_FLOAT, 8000)
OPTION(mds_bal_unreplicate_threshold, OPT_FLOAT, 0)
OPTION(mds_bal_frag, OPT_BOOL, true)
OPTION(mds_bal_split_size, OPT_INT, 10000)
OPTION(mds_bal_split_rd, OPT_FLOAT, 25000)
OPTION(mds_bal_split_wr, OPT_FLOAT, 10000)
OPTION(mds_bal_split_bits, OPT_INT, 3)
OPTION(mds_bal_merge_size, OPT_INT, 50)
OPTION(mds_bal_interval, OPT_INT, 10)           // seconds
OPTION(mds_bal_fragment_interval, OPT_INT, 5)      // seconds
OPTION(mds_bal_fragment_size_max, OPT_INT, 10000*10) // order of magnitude higher than split size
OPTION(mds_bal_fragment_fast_factor, OPT_FLOAT, 1.5) // multiple of size_max that triggers immediate split
OPTION(mds_bal_idle_threshold, OPT_FLOAT, 0)
OPTION(mds_bal_max, OPT_INT, -1)
OPTION(mds_bal_max_until, OPT_INT, -1)
OPTION(mds_bal_mode, OPT_INT, 0)
OPTION(mds_bal_min_rebalance, OPT_FLOAT, .1)  // must be this much above average before we export anything
OPTION(mds_bal_min_start, OPT_FLOAT, .2)      // if we need less than this, we don't do anything
OPTION(mds_bal_need_min, OPT_FLOAT, .8)       // take within this range of what we need
OPTION(mds_bal_need_max, OPT_FLOAT, 1.2)
OPTION(mds_bal_midchunk, OPT_FLOAT, .3)       // any sub bigger than this taken in full
OPTION(mds_bal_minchunk, OPT_FLOAT, .001)     // never take anything smaller than this
OPTION(mds_bal_target_decay, OPT_DOUBLE, 10.0) // target decay half-life in MDSMap (2x larger is approx. 2x slower)
OPTION(mds_replay_interval, OPT_FLOAT, 1.0) // time to wait before starting replay again
OPTION(mds_shutdown_check, OPT_INT, 0)
OPTION(mds_thrash_exports, OPT_INT, 0)
OPTION(mds_thrash_fragments, OPT_INT, 0)
OPTION(mds_dump_cache_on_map, OPT_BOOL, false)
OPTION(mds_dump_cache_after_rejoin, OPT_BOOL, false)
OPTION(mds_verify_scatter, OPT_BOOL, false)
OPTION(mds_debug_scatterstat, OPT_BOOL, false)
OPTION(mds_debug_frag, OPT_BOOL, false)
OPTION(mds_debug_auth_pins, OPT_BOOL, false)
OPTION(mds_debug_subtrees, OPT_BOOL, false)
OPTION(mds_kill_mdstable_at, OPT_INT, 0)
OPTION(mds_kill_export_at, OPT_INT, 0)
OPTION(mds_kill_import_at, OPT_INT, 0)
OPTION(mds_kill_link_at, OPT_INT, 0)
OPTION(mds_kill_rename_at, OPT_INT, 0)
OPTION(mds_kill_openc_at, OPT_INT, 0)
OPTION(mds_kill_journal_at, OPT_INT, 0)
OPTION(mds_kill_journal_expire_at, OPT_INT, 0)
OPTION(mds_kill_journal_replay_at, OPT_INT, 0)
OPTION(mds_journal_format, OPT_U32, 1)  // Default to most recent JOURNAL_FORMAT_*
OPTION(mds_kill_create_at, OPT_INT, 0)
OPTION(mds_inject_traceless_reply_probability, OPT_DOUBLE, 0) /* percentage
                                of MDS modify replies to skip sending the
                                client a trace on [0-1]*/
OPTION(mds_wipe_sessions, OPT_BOOL, 0)
OPTION(mds_wipe_ino_prealloc, OPT_BOOL, 0)
OPTION(mds_skip_ino, OPT_INT, 0)
OPTION(mds_standby_for_name, OPT_STR, "")
OPTION(mds_standby_for_rank, OPT_INT, -1)
OPTION(mds_standby_for_fscid, OPT_INT, -1)
OPTION(mds_standby_replay, OPT_BOOL, false)
OPTION(mds_enable_op_tracker, OPT_BOOL, true) // enable/disable MDS op tracking
OPTION(mds_op_history_size, OPT_U32, 20)    // Max number of completed ops to track
OPTION(mds_op_history_duration, OPT_U32, 600) // Oldest completed op to track
OPTION(mds_op_complaint_time, OPT_FLOAT, 30) // how many seconds old makes an op complaint-worthy
OPTION(mds_op_log_threshold, OPT_INT, 5) // how many op log messages to show in one go
OPTION(mds_snap_min_uid, OPT_U32, 0) // The minimum UID required to create a snapshot
OPTION(mds_snap_max_uid, OPT_U32, 4294967294) // The maximum UID allowed to create a snapshot
OPTION(mds_snap_rstat, OPT_BOOL, false) // enable/disbale nested stat for snapshot
OPTION(mds_verify_backtrace, OPT_U32, 1)
// detect clients which aren't trimming completed requests
OPTION(mds_max_completed_flushes, OPT_U32, 100000)
OPTION(mds_max_completed_requests, OPT_U32, 100000)

OPTION(mds_action_on_write_error, OPT_U32, 1) // 0: ignore; 1: force readonly; 2: crash
OPTION(mds_mon_shutdown_timeout, OPT_DOUBLE, 5)

// Maximum number of concurrent stray files to purge
OPTION(mds_max_purge_files, OPT_U32, 64)
// Maximum number of concurrent RADOS ops to issue in purging
OPTION(mds_max_purge_ops, OPT_U32, 8192)
// Maximum number of concurrent RADOS ops to issue in purging, scaled by PG count
OPTION(mds_max_purge_ops_per_pg, OPT_FLOAT, 0.5)

OPTION(mds_purge_queue_busy_flush_period, OPT_FLOAT, 1.0)

OPTION(mds_root_ino_uid, OPT_INT, 0) // The UID of / on new filesystems
OPTION(mds_root_ino_gid, OPT_INT, 0) // The GID of / on new filesystems

OPTION(mds_max_scrub_ops_in_progress, OPT_INT, 5) // the number of simultaneous scrubs allowed

// Maximum number of damaged frags/dentries before whole MDS rank goes damaged
OPTION(mds_damage_table_max_entries, OPT_INT, 10000)

// Maximum increment for client writable range, counted by number of objects
OPTION(mds_client_writeable_range_max_inc_objs, OPT_U32, 1024)

// verify backend can support configured max object name length
OPTION(osd_check_max_object_name_len_on_startup, OPT_BOOL, true)

// Maximum number of backfills to or from a single osd
OPTION(osd_max_backfills, OPT_U64, 1)

// Minimum recovery priority (255 = max, smaller = lower)
OPTION(osd_min_recovery_priority, OPT_INT, 0)

// Seconds to wait before retrying refused backfills
OPTION(osd_backfill_retry_interval, OPT_DOUBLE, 30.0)

// Seconds to wait before retrying refused recovery
OPTION(osd_recovery_retry_interval, OPT_DOUBLE, 30.0)

// max agent flush ops
OPTION(osd_agent_max_ops, OPT_INT, 4)
OPTION(osd_agent_max_low_ops, OPT_INT, 2)
OPTION(osd_agent_min_evict_effort, OPT_FLOAT, .1)
OPTION(osd_agent_quantize_effort, OPT_FLOAT, .1)
OPTION(osd_agent_delay_time, OPT_FLOAT, 5.0)

// osd ignore history.last_epoch_started in find_best_info
OPTION(osd_find_best_info_ignore_history_les, OPT_BOOL, false)

// decay atime and hist histograms after how many objects go by
OPTION(osd_agent_hist_halflife, OPT_INT, 1000)

// must be this amount over the threshold to enable,
// this amount below the threshold to disable.
OPTION(osd_agent_slop, OPT_FLOAT, .02)

OPTION(osd_uuid, OPT_UUID, uuid_d())
OPTION(osd_data, OPT_STR, "/var/lib/ceph/osd/$cluster-$id")
OPTION(osd_journal, OPT_STR, "/var/lib/ceph/osd/$cluster-$id/journal")
OPTION(osd_journal_size, OPT_INT, 5120)         // in mb
OPTION(osd_journal_flush_on_shutdown, OPT_BOOL, true) // Flush journal to data store on shutdown
// flags for specific control purpose during osd mount() process. 
// e.g., can be 1 to skip over replaying journal
// or 2 to skip over mounting omap or 3 to skip over both.
// This might be helpful in case the journal is totally corrupted
// and we still want to bring the osd daemon back normally, etc.
OPTION(osd_os_flags, OPT_U32, 0)
OPTION(osd_max_write_size, OPT_INT, 90)
OPTION(osd_max_pgls, OPT_U64, 1024) // max number of pgls entries to return
OPTION(osd_client_message_size_cap, OPT_U64, 500*1024L*1024L) // client data allowed in-memory (in bytes)
OPTION(osd_client_message_cap, OPT_U64, 100)              // num client messages allowed in-memory
OPTION(osd_pg_bits, OPT_INT, 6)  // bits per osd
OPTION(osd_pgp_bits, OPT_INT, 6)  // bits per osd
OPTION(osd_crush_update_weight_set, OPT_BOOL, true) // update weight set while updating weights
OPTION(osd_crush_chooseleaf_type, OPT_INT, 1) // 1 = host
OPTION(osd_pool_use_gmt_hitset, OPT_BOOL, true) // try to use gmt for hitset archive names if all osds in cluster support it.
OPTION(osd_crush_update_on_start, OPT_BOOL, true)
OPTION(osd_crush_initial_weight, OPT_DOUBLE, -1) // if >=0, the initial weight is for newly added osds.
OPTION(osd_pool_default_crush_rule, OPT_INT, -1)
OPTION(osd_pool_erasure_code_stripe_unit, OPT_U32, 4096) // in bytes
OPTION(osd_pool_default_size, OPT_INT, 3)
OPTION(osd_pool_default_min_size, OPT_INT, 0)  // 0 means no specific default; ceph will use size-size/2
OPTION(osd_pool_default_pg_num, OPT_INT, 8) // number of PGs for new pools. Configure in global or mon section of ceph.conf
OPTION(osd_pool_default_pgp_num, OPT_INT, 8) // number of PGs for placement purposes. Should be equal to pg_num
OPTION(osd_pool_default_erasure_code_profile,
       OPT_STR,
       "plugin=jerasure "
       "technique=reed_sol_van "
       "k=2 "
       "m=1 "
       ) // default properties of osd pool create
OPTION(osd_erasure_code_plugins, OPT_STR,
       "jerasure"
       " lrc"
#ifdef HAVE_BETTER_YASM_ELF64
       " isa"
#endif
       ) // list of erasure code plugins

// Allows the "peered" state for recovery and backfill below min_size
OPTION(osd_allow_recovery_below_min_size, OPT_BOOL, true)

OPTION(osd_pool_default_flags, OPT_INT, 0)   // default flags for new pools
OPTION(osd_pool_default_flag_hashpspool, OPT_BOOL, true)   // use new pg hashing to prevent pool/pg overlap
OPTION(osd_pool_default_flag_nodelete, OPT_BOOL, false) // pool can't be deleted
OPTION(osd_pool_default_flag_nopgchange, OPT_BOOL, false) // pool's pg and pgp num can't be changed
OPTION(osd_pool_default_flag_nosizechange, OPT_BOOL, false) // pool's size and min size can't be changed
OPTION(osd_pool_default_hit_set_bloom_fpp, OPT_FLOAT, .05)
OPTION(osd_pool_default_cache_target_dirty_ratio, OPT_FLOAT, .4)
OPTION(osd_pool_default_cache_target_dirty_high_ratio, OPT_FLOAT, .6)
OPTION(osd_pool_default_cache_target_full_ratio, OPT_FLOAT, .8)
OPTION(osd_pool_default_cache_min_flush_age, OPT_INT, 0)  // seconds
OPTION(osd_pool_default_cache_min_evict_age, OPT_INT, 0)  // seconds
OPTION(osd_pool_default_cache_max_evict_check_size, OPT_INT, 10)  // max size to check for eviction
OPTION(osd_hit_set_min_size, OPT_INT, 1000)  // min target size for a HitSet
OPTION(osd_hit_set_max_size, OPT_INT, 100000)  // max target size for a HitSet
OPTION(osd_hit_set_namespace, OPT_STR, ".ceph-internal") // rados namespace for hit_set tracking

// conservative default throttling values
OPTION(osd_tier_promote_max_objects_sec, OPT_U64, 25)
OPTION(osd_tier_promote_max_bytes_sec, OPT_U64, 5 * 1024*1024)

OPTION(osd_tier_default_cache_mode, OPT_STR, "writeback")
OPTION(osd_tier_default_cache_hit_set_count, OPT_INT, 4)
OPTION(osd_tier_default_cache_hit_set_period, OPT_INT, 1200)
OPTION(osd_tier_default_cache_hit_set_type, OPT_STR, "bloom")
OPTION(osd_tier_default_cache_min_read_recency_for_promote, OPT_INT, 1) // number of recent HitSets the object must appear in to be promoted (on read)
OPTION(osd_tier_default_cache_min_write_recency_for_promote, OPT_INT, 1) // number of recent HitSets the object must appear in to be promoted (on write)
OPTION(osd_tier_default_cache_hit_set_grade_decay_rate, OPT_INT, 20)
OPTION(osd_tier_default_cache_hit_set_search_last_n, OPT_INT, 1)

OPTION(osd_map_dedup, OPT_BOOL, true)
OPTION(osd_map_max_advance, OPT_INT, 40) // make this < cache_size!
OPTION(osd_map_cache_size, OPT_INT, 50)
OPTION(osd_map_message_max, OPT_INT, 40)  // max maps per MOSDMap message
OPTION(osd_map_share_max_epochs, OPT_INT, 40)  // cap on # of inc maps we send to peers, clients
OPTION(osd_inject_bad_map_crc_probability, OPT_FLOAT, 0)
OPTION(osd_inject_failure_on_pg_removal, OPT_BOOL, false)
// shutdown the OSD if stuatus flipping more than max_markdown_count times in recent max_markdown_period seconds
OPTION(osd_max_markdown_period , OPT_INT, 600)
OPTION(osd_max_markdown_count, OPT_INT, 5)

OPTION(osd_peering_wq_threads, OPT_INT, 2)
OPTION(osd_peering_wq_batch_size, OPT_U64, 20)
OPTION(osd_op_pq_max_tokens_per_priority, OPT_U64, 4194304)
OPTION(osd_op_pq_min_cost, OPT_U64, 65536)
OPTION(osd_disk_threads, OPT_INT, 1)
OPTION(osd_disk_thread_ioprio_class, OPT_STR, "") // rt realtime be best effort idle
OPTION(osd_disk_thread_ioprio_priority, OPT_INT, -1) // 0-7
OPTION(osd_recover_clone_overlap, OPT_BOOL, true)   // preserve clone_overlap during recovery/migration
OPTION(osd_op_num_threads_per_shard, OPT_INT, 0)
OPTION(osd_op_num_threads_per_shard_hdd, OPT_INT, 1)
OPTION(osd_op_num_threads_per_shard_ssd, OPT_INT, 2)
OPTION(osd_op_num_shards, OPT_INT, 0)
OPTION(osd_op_num_shards_hdd, OPT_INT, 5)
OPTION(osd_op_num_shards_ssd, OPT_INT, 8)
OPTION(osd_op_queue, OPT_STR, "wpq") // PrioritzedQueue (prio), Weighted Priority Queue (wpq), or debug_random
OPTION(osd_op_queue_cut_off, OPT_STR, "low") // Min priority to go to strict queue. (low, high, debug_random)

OPTION(osd_ignore_stale_divergent_priors, OPT_BOOL, false) // do not assert on divergent_prior entries which aren't in the log and whose on-disk objects are newer

// Set to true for testing.  Users should NOT set this.
// If set to true even after reading enough shards to
// decode the object, any error will be reported.
OPTION(osd_read_ec_check_for_errors, OPT_BOOL, false) // return error if any ec shard has an error

// Only use clone_overlap for recovery if there are fewer than
// osd_recover_clone_overlap_limit entries in the overlap set
OPTION(osd_recover_clone_overlap_limit, OPT_INT, 10)

OPTION(osd_backfill_scan_min, OPT_INT, 64)
OPTION(osd_backfill_scan_max, OPT_INT, 512)
OPTION(osd_op_thread_timeout, OPT_INT, 15)
OPTION(osd_op_thread_suicide_timeout, OPT_INT, 150)
OPTION(osd_recovery_thread_timeout, OPT_INT, 30)
OPTION(osd_recovery_thread_suicide_timeout, OPT_INT, 300)
OPTION(osd_recovery_sleep, OPT_FLOAT, 0.01)         // seconds to sleep between recovery ops
OPTION(osd_snap_trim_sleep, OPT_DOUBLE, 0)
OPTION(osd_scrub_invalid_stats, OPT_BOOL, true)
OPTION(osd_remove_thread_timeout, OPT_INT, 60*60)
OPTION(osd_remove_thread_suicide_timeout, OPT_INT, 10*60*60)
OPTION(osd_command_thread_timeout, OPT_INT, 10*60)
OPTION(osd_command_thread_suicide_timeout, OPT_INT, 15*60)
OPTION(osd_heartbeat_addr, OPT_ADDR, entity_addr_t())
OPTION(osd_heartbeat_interval, OPT_INT, 6)       // (seconds) how often we ping peers

// (seconds) how long before we decide a peer has failed
// This setting is read by the MONs and OSDs and has to be set to a equal value in both settings of the configuration
OPTION(osd_heartbeat_grace, OPT_INT, 20)
OPTION(osd_heartbeat_min_peers, OPT_INT, 10)     // minimum number of peers
OPTION(osd_heartbeat_use_min_delay_socket, OPT_BOOL, false) // prio the heartbeat tcp socket and set dscp as CS6 on it if true
OPTION(osd_heartbeat_min_size, OPT_INT, 2000) // the minimum size of OSD heartbeat messages to send

// max number of parallel snap trims/pg
OPTION(osd_pg_max_concurrent_snap_trims, OPT_U64, 2)
// max number of trimming pgs
OPTION(osd_max_trimming_pgs, OPT_U64, 2)

// minimum number of peers that must be reachable to mark ourselves
// back up after being wrongly marked down.
OPTION(osd_heartbeat_min_healthy_ratio, OPT_FLOAT, .33)

OPTION(osd_mon_heartbeat_interval, OPT_INT, 30)  // (seconds) how often to ping monitor if no peers
OPTION(osd_mon_report_interval_max, OPT_INT, 600)
OPTION(osd_mon_report_interval_min, OPT_INT, 5)  // pg stats, failures, up_thru, boot.
OPTION(osd_mon_report_max_in_flight, OPT_INT, 2)  // max updates in flight
OPTION(osd_beacon_report_interval, OPT_INT, 300)       // (second) how often to send beacon message to monitor
OPTION(osd_pg_stat_report_interval_max, OPT_INT, 500)  // report pg stats for any given pg at least this often
OPTION(osd_mon_ack_timeout, OPT_DOUBLE, 30.0) // time out a mon if it doesn't ack stats
OPTION(osd_stats_ack_timeout_factor, OPT_DOUBLE, 2.0) // multiples of mon_ack_timeout
OPTION(osd_stats_ack_timeout_decay, OPT_DOUBLE, .9)
OPTION(osd_default_data_pool_replay_window, OPT_INT, 45)
OPTION(osd_preserve_trimmed_log, OPT_BOOL, false)
OPTION(osd_auto_mark_unfound_lost, OPT_BOOL, false)
OPTION(osd_recovery_delay_start, OPT_FLOAT, 0)
OPTION(osd_recovery_max_active, OPT_U64, 3)
OPTION(osd_recovery_max_single_start, OPT_U64, 1)
OPTION(osd_recovery_max_chunk, OPT_U64, 8<<20)  // max size of push chunk
OPTION(osd_recovery_max_omap_entries_per_chunk, OPT_U64, 64000) // max number of omap entries per chunk; 0 to disable limit
OPTION(osd_copyfrom_max_chunk, OPT_U64, 8<<20)   // max size of a COPYFROM chunk
OPTION(osd_push_per_object_cost, OPT_U64, 1000)  // push cost per object
OPTION(osd_max_push_cost, OPT_U64, 8<<20)  // max size of push message
OPTION(osd_max_push_objects, OPT_U64, 10)  // max objects in single push op
OPTION(osd_recovery_forget_lost_objects, OPT_BOOL, false)   // off for now
OPTION(osd_max_scrubs, OPT_INT, 1)
OPTION(osd_scrub_during_recovery, OPT_BOOL, false) // Allow new scrubs to start while recovery is active on the OSD
OPTION(osd_scrub_begin_hour, OPT_INT, 0)
OPTION(osd_scrub_end_hour, OPT_INT, 24)
OPTION(osd_scrub_load_threshold, OPT_FLOAT, 0.5)
OPTION(osd_scrub_min_interval, OPT_FLOAT, 60*60*24)    // if load is low
OPTION(osd_scrub_max_interval, OPT_FLOAT, 7*60*60*24)  // regardless of load
OPTION(osd_scrub_interval_randomize_ratio, OPT_FLOAT, 0.5) // randomize the scheduled scrub in the span of [min,min*(1+randomize_ratio))
OPTION(osd_scrub_backoff_ratio, OPT_DOUBLE, .66)   // the probability to back off the scheduled scrub
OPTION(osd_scrub_chunk_min, OPT_INT, 5)
OPTION(osd_scrub_chunk_max, OPT_INT, 25)
OPTION(osd_scrub_sleep, OPT_FLOAT, 0)   // sleep between [deep]scrub ops
OPTION(osd_scrub_auto_repair, OPT_BOOL, false)   // whether auto-repair inconsistencies upon deep-scrubbing
OPTION(osd_scrub_auto_repair_num_errors, OPT_U32, 5)   // only auto-repair when number of errors is below this threshold
OPTION(osd_deep_scrub_interval, OPT_FLOAT, 60*60*24*7) // once a week
OPTION(osd_deep_scrub_randomize_ratio, OPT_FLOAT, 0.15) // scrubs will randomly become deep scrubs at this rate (0.15 -> 15% of scrubs are deep)
OPTION(osd_deep_scrub_stride, OPT_INT, 524288)
OPTION(osd_deep_scrub_update_digest_min_age, OPT_INT, 2*60*60)   // objects must be this old (seconds) before we update the whole-object digest on scrub
OPTION(osd_scan_list_ping_tp_interval, OPT_U64, 100)
OPTION(osd_class_dir, OPT_STR, CEPH_LIBDIR "/rados-classes") // where rados plugins are stored
OPTION(osd_open_classes_on_start, OPT_BOOL, true)
OPTION(osd_class_load_list, OPT_STR, "cephfs hello journal lock log numops "
    "rbd refcount replica_log rgw statelog timeindex user version") // list of object classes allowed to be loaded (allow all: *)
OPTION(osd_class_default_list, OPT_STR, "cephfs hello journal lock log numops "
    "rbd refcount replica_log rgw statelog timeindex user version") // list of object classes with default execute perm (allow all: *)
OPTION(osd_check_for_log_corruption, OPT_BOOL, false)
OPTION(osd_use_stale_snap, OPT_BOOL, false)
OPTION(osd_rollback_to_cluster_snap, OPT_STR, "")
OPTION(osd_default_notify_timeout, OPT_U32, 30) // default notify timeout in seconds
OPTION(osd_kill_backfill_at, OPT_INT, 0)

// Bounds how infrequently a new map epoch will be persisted for a pg
OPTION(osd_pg_epoch_persisted_max_stale, OPT_U32, 40) // make this < map_cache_size!

OPTION(osd_min_pg_log_entries, OPT_U32, 3000)  // number of entries to keep in the pg log when trimming it
OPTION(osd_max_pg_log_entries, OPT_U32, 10000) // max entries, say when degraded, before we trim
OPTION(osd_force_recovery_pg_log_entries_factor, OPT_FLOAT, 1.3) // max entries factor before force recovery
OPTION(osd_pg_log_trim_min, OPT_U32, 100)
OPTION(osd_op_complaint_time, OPT_FLOAT, 30) // how many seconds old makes an op complaint-worthy
OPTION(osd_command_max_records, OPT_INT, 256)
OPTION(osd_max_pg_blocked_by, OPT_U32, 16)    // max peer osds to report that are blocking our progress
OPTION(osd_op_log_threshold, OPT_INT, 5) // how many op log messages to show in one go
OPTION(osd_verify_sparse_read_holes, OPT_BOOL, false)  // read fiemap-reported holes and verify they are zeros
OPTION(osd_backoff_on_unfound, OPT_BOOL, true)   // object unfound
OPTION(osd_backoff_on_degraded, OPT_BOOL, false) // [mainly for debug?] object unreadable/writeable
OPTION(osd_backoff_on_down, OPT_BOOL, true)      // pg in down/incomplete state
OPTION(osd_backoff_on_peering, OPT_BOOL, false)  // [debug] pg peering
OPTION(osd_debug_crash_on_ignored_backoff, OPT_BOOL, false) // crash osd if client ignores a backoff; useful for debugging
OPTION(osd_debug_inject_dispatch_delay_probability, OPT_DOUBLE, 0)
OPTION(osd_debug_inject_dispatch_delay_duration, OPT_DOUBLE, .1)
OPTION(osd_debug_drop_ping_probability, OPT_DOUBLE, 0)
OPTION(osd_debug_drop_ping_duration, OPT_INT, 0)
OPTION(osd_debug_op_order, OPT_BOOL, false)
OPTION(osd_debug_verify_missing_on_start, OPT_BOOL, false)
OPTION(osd_debug_scrub_chance_rewrite_digest, OPT_U64, 0)
OPTION(osd_debug_verify_snaps_on_info, OPT_BOOL, false)
OPTION(osd_debug_verify_stray_on_activate, OPT_BOOL, false)
OPTION(osd_debug_skip_full_check_in_backfill_reservation, OPT_BOOL, false)
OPTION(osd_debug_reject_backfill_probability, OPT_DOUBLE, 0)
OPTION(osd_debug_inject_copyfrom_error, OPT_BOOL, false)  // inject failure during copyfrom completion
OPTION(osd_debug_misdirected_ops, OPT_BOOL, false)
OPTION(osd_debug_skip_full_check_in_recovery, OPT_BOOL, false)
OPTION(osd_debug_verify_cached_snaps, OPT_BOOL, false)
OPTION(osd_enable_op_tracker, OPT_BOOL, true) // enable/disable OSD op tracking
OPTION(osd_num_op_tracker_shard, OPT_U32, 32) // The number of shards for holding the ops
OPTION(osd_op_history_size, OPT_U32, 20)    // Max number of completed ops to track
OPTION(osd_op_history_duration, OPT_U32, 600) // Oldest completed op to track
OPTION(osd_op_history_slow_op_size, OPT_U32, 20)           // Max number of slow ops to track
OPTION(osd_op_history_slow_op_threshold, OPT_DOUBLE, 10.0) // track the op if over this threshold
OPTION(osd_target_transaction_size, OPT_INT, 30)     // to adjust various transactions that batch smaller items
OPTION(osd_failsafe_full_ratio, OPT_FLOAT, .97) // what % full makes an OSD "full" (failsafe)
OPTION(osd_fast_fail_on_connection_refused, OPT_BOOL, true) // immediately mark OSDs as down once they refuse to accept connections

OPTION(osd_pg_object_context_cache_count, OPT_INT, 64)
OPTION(osd_tracing, OPT_BOOL, false) // true if LTTng-UST tracepoints should be enabled
OPTION(osd_function_tracing, OPT_BOOL, false) // true if function instrumentation should use LTTng

OPTION(osd_fast_info, OPT_BOOL, true) // use fast info attr, if we can

// determines whether PGLog::check() compares written out log to stored log
OPTION(osd_debug_pg_log_writeout, OPT_BOOL, false)
OPTION(osd_loop_before_reset_tphandle, OPT_U32, 64) // Max number of loop before we reset thread-pool's handle
// default timeout while caling WaitInterval on an empty queue
OPTION(threadpool_default_timeout, OPT_INT, 60)
// default wait time for an empty queue before pinging the hb timeout
OPTION(threadpool_empty_queue_max_wait, OPT_INT, 2)

OPTION(leveldb_log_to_ceph_log, OPT_BOOL, true)
OPTION(leveldb_write_buffer_size, OPT_U64, 8 *1024*1024) // leveldb write buffer size
OPTION(leveldb_cache_size, OPT_U64, 128 *1024*1024) // leveldb cache size
OPTION(leveldb_block_size, OPT_U64, 0) // leveldb block size
OPTION(leveldb_bloom_size, OPT_INT, 0) // leveldb bloom bits per entry
OPTION(leveldb_max_open_files, OPT_INT, 0) // leveldb max open files
OPTION(leveldb_compression, OPT_BOOL, true) // leveldb uses compression
OPTION(leveldb_paranoid, OPT_BOOL, false) // leveldb paranoid flag
OPTION(leveldb_log, OPT_STR, "/dev/null")  // enable leveldb log file
OPTION(leveldb_compact_on_mount, OPT_BOOL, false)

OPTION(kinetic_host, OPT_STR, "") // hostname or ip address of a kinetic drive to use
OPTION(kinetic_port, OPT_INT, 8123) // port number of the kinetic drive
OPTION(kinetic_user_id, OPT_INT, 1) // kinetic user to authenticate as
OPTION(kinetic_hmac_key, OPT_STR, "asdfasdf") // kinetic key to authenticate with
OPTION(kinetic_use_ssl, OPT_BOOL, false) // whether to secure kinetic traffic with TLS


OPTION(rocksdb_separate_wal_dir, OPT_BOOL, false) // use $path.wal for wal
SAFE_OPTION(rocksdb_db_paths, OPT_STR, "")   // path,size( path,size)*
OPTION(rocksdb_log_to_ceph_log, OPT_BOOL, true)  // log to ceph log
OPTION(rocksdb_cache_size, OPT_U64, 128*1024*1024)  // default rocksdb cache size
OPTION(rocksdb_cache_row_ratio, OPT_FLOAT, .2)   // ratio of cache for row (vs block)
OPTION(rocksdb_cache_shard_bits, OPT_INT, 4)  // rocksdb block cache shard bits, 4 bit -> 16 shards
OPTION(rocksdb_cache_type, OPT_STR, "lru") // 'lru' or 'clock'
OPTION(rocksdb_block_size, OPT_INT, 4*1024)  // default rocksdb block size
OPTION(rocksdb_perf, OPT_BOOL, false) // Enabling this will have 5-10% impact on performance for the stats collection
OPTION(rocksdb_collect_compaction_stats, OPT_BOOL, false) //For rocksdb, this behavior will be an overhead of 5%~10%, collected only rocksdb_perf is enabled.
OPTION(rocksdb_collect_extended_stats, OPT_BOOL, false) //For rocksdb, this behavior will be an overhead of 5%~10%, collected only rocksdb_perf is enabled.
OPTION(rocksdb_collect_memory_stats, OPT_BOOL, false) //For rocksdb, this behavior will be an overhead of 5%~10%, collected only rocksdb_perf is enabled.
OPTION(rocksdb_enable_rmrange, OPT_BOOL, false) // see https://github.com/facebook/rocksdb/blob/master/include/rocksdb/db.h#L253

// rocksdb options that will be used for omap(if omap_backend is rocksdb)
OPTION(filestore_rocksdb_options, OPT_STR, "")
// rocksdb options that will be used in monstore
OPTION(mon_rocksdb_options, OPT_STR, "write_buffer_size=33554432,compression=kNoCompression")

/**
 * osd_*_priority adjust the relative priority of client io, recovery io,
 * snaptrim io, etc
 *
 * osd_*_priority determines the ratio of available io between client and
 * recovery.  Each option may be set between
 * 1..63.
 */
OPTION(osd_client_op_priority, OPT_U32, 63)
OPTION(osd_recovery_op_priority, OPT_U32, 3)

OPTION(osd_snap_trim_priority, OPT_U32, 5)
OPTION(osd_snap_trim_cost, OPT_U32, 1<<20) // set default cost equal to 1MB io

OPTION(osd_scrub_priority, OPT_U32, 5)
// set default cost equal to 50MB io
OPTION(osd_scrub_cost, OPT_U32, 50<<20) 
// set requested scrub priority higher than scrub priority to make the
// requested scrubs jump the queue of scheduled scrubs
OPTION(osd_requested_scrub_priority, OPT_U32, 120)

OPTION(osd_recovery_priority, OPT_U32, 5)
// set default cost equal to 20MB io
OPTION(osd_recovery_cost, OPT_U32, 20<<20)

/**
 * osd_recovery_op_warn_multiple scales the normal warning threshhold,
 * osd_op_complaint_time, so that slow recovery ops won't cause noise
 */
OPTION(osd_recovery_op_warn_multiple, OPT_U32, 16)

// Max time to wait between notifying mon of shutdown and shutting down
OPTION(osd_mon_shutdown_timeout, OPT_DOUBLE, 5)
OPTION(osd_shutdown_pgref_assert, OPT_BOOL, false) // crash if the OSD has stray PG refs on shutdown

OPTION(osd_max_object_size, OPT_U64, 128*1024L*1024L) // OSD's maximum object size
OPTION(osd_max_object_name_len, OPT_U32, 2048) // max rados object name len
OPTION(osd_max_object_namespace_len, OPT_U32, 256) // max rados object namespace len
OPTION(osd_max_attr_name_len, OPT_U32, 100)    // max rados attr name len; cannot go higher than 100 chars for file system backends
OPTION(osd_max_attr_size, OPT_U64, 0)

OPTION(osd_max_omap_entries_per_request, OPT_U64, 131072)
OPTION(osd_max_omap_bytes_per_request, OPT_U64, 1<<30)

OPTION(osd_objectstore, OPT_STR, "filestore")  // ObjectStore backend type
OPTION(osd_objectstore_tracing, OPT_BOOL, false) // true if LTTng-UST tracepoints should be enabled
OPTION(osd_objectstore_fuse, OPT_BOOL, false)

OPTION(osd_bench_small_size_max_iops, OPT_U32, 100) // 100 IOPS
OPTION(osd_bench_large_size_max_throughput, OPT_U64, 100 << 20) // 100 MB/s
OPTION(osd_bench_max_block_size, OPT_U64, 64 << 20) // cap the block size at 64MB
OPTION(osd_bench_duration, OPT_U32, 30) // duration of 'osd bench', capped at 30s to avoid triggering timeouts

OPTION(osd_blkin_trace_all, OPT_BOOL, false) // create a blkin trace for all osd requests
OPTION(osdc_blkin_trace_all, OPT_BOOL, false) // create a blkin trace for all objecter requests

OPTION(osd_discard_disconnected_ops, OPT_BOOL, true)

OPTION(memstore_device_bytes, OPT_U64, 1024*1024*1024)
OPTION(memstore_page_set, OPT_BOOL, true)
OPTION(memstore_page_size, OPT_U64, 64 << 10)

OPTION(bdev_debug_inflight_ios, OPT_BOOL, false)
OPTION(bdev_inject_crash, OPT_INT, 0)  // if N>0, then ~ 1/N IOs will complete before we crash on flush.
OPTION(bdev_inject_crash_flush_delay, OPT_INT, 2) // wait N more seconds on flush
OPTION(bdev_aio, OPT_BOOL, true)
OPTION(bdev_aio_poll_ms, OPT_INT, 250)  // milliseconds
OPTION(bdev_aio_max_queue_depth, OPT_INT, 1024)
OPTION(bdev_block_size, OPT_INT, 4096)
OPTION(bdev_debug_aio, OPT_BOOL, false)
OPTION(bdev_debug_aio_suicide_timeout, OPT_FLOAT, 60.0)

// if yes, osd will unbind all NVMe devices from kernel driver and bind them
// to the uio_pci_generic driver. The purpose is to prevent the case where
// NVMe driver is loaded while osd is running.
OPTION(bdev_nvme_unbind_from_kernel, OPT_BOOL, false)
OPTION(bdev_nvme_retry_count, OPT_INT, -1) // -1 means by default which is 4

OPTION(objectstore_blackhole, OPT_BOOL, false)

OPTION(bluefs_alloc_size, OPT_U64, 1048576)
OPTION(bluefs_max_prefetch, OPT_U64, 1048576)
OPTION(bluefs_min_log_runway, OPT_U64, 1048576)  // alloc when we get this low
OPTION(bluefs_max_log_runway, OPT_U64, 4194304)  // alloc this much at a time
OPTION(bluefs_log_compact_min_ratio, OPT_FLOAT, 5.0)      // before we consider
OPTION(bluefs_log_compact_min_size, OPT_U64, 16*1048576)  // before we consider
OPTION(bluefs_min_flush_size, OPT_U64, 524288)  // ignore flush until its this big
OPTION(bluefs_compact_log_sync, OPT_BOOL, false)  // sync or async log compaction?
OPTION(bluefs_buffered_io, OPT_BOOL, false)
OPTION(bluefs_sync_write, OPT_BOOL, false)
OPTION(bluefs_allocator, OPT_STR, "bitmap")     // stupid | bitmap
OPTION(bluefs_preextend_wal_files, OPT_BOOL, false)  // this *requires* that rocksdb has recycling enabled

OPTION(bluestore_bluefs, OPT_BOOL, true)
OPTION(bluestore_bluefs_env_mirror, OPT_BOOL, false) // mirror to normal Env for debug
OPTION(bluestore_bluefs_min, OPT_U64, 1*1024*1024*1024) // 1gb
OPTION(bluestore_bluefs_min_ratio, OPT_FLOAT, .02)  // min fs free / total free
OPTION(bluestore_bluefs_max_ratio, OPT_FLOAT, .90)  // max fs free / total free
OPTION(bluestore_bluefs_gift_ratio, OPT_FLOAT, .02) // how much to add at a time
OPTION(bluestore_bluefs_reclaim_ratio, OPT_FLOAT, .20) // how much to reclaim at a time
OPTION(bluestore_bluefs_balance_interval, OPT_FLOAT, 1) // how often (sec) to balance free space between bluefs and bluestore
// If you want to use spdk driver, you need to specify NVMe serial number here
// with "spdk:" prefix.
// Users can use 'lspci -vvv -d 8086:0953 | grep "Device Serial Number"' to
// get the serial number of Intel(R) Fultondale NVMe controllers.
// Example:
// bluestore_block_path = spdk:55cd2e404bd73932
// If you want to run multiple SPDK instances per node, you must specify the
// amount of dpdk memory size in MB each instance will use, to make sure each
// instance uses its own dpdk memory
OPTION(bluestore_spdk_mem, OPT_U32, 512)
// A hexadecimal bit mask of the cores to run on. Note the core numbering can change between platforms and should be determined beforehand.
OPTION(bluestore_spdk_coremask, OPT_STR, "0x3")
// Specify the maximal I/Os to be batched completed while checking queue pair completions.
// Default value 0 means that let SPDK nvme library determine the value.
OPTION(bluestore_spdk_max_io_completion, OPT_U32, 0)
OPTION(bluestore_block_path, OPT_STR, "")
OPTION(bluestore_block_size, OPT_U64, 10 * 1024*1024*1024)  // 10gb for testing
OPTION(bluestore_block_create, OPT_BOOL, true)
OPTION(bluestore_block_db_path, OPT_STR, "")
OPTION(bluestore_block_db_size, OPT_U64, 0)   // rocksdb ssts (hot/warm)
OPTION(bluestore_block_db_create, OPT_BOOL, false)
OPTION(bluestore_block_wal_path, OPT_STR, "")
OPTION(bluestore_block_wal_size, OPT_U64, 96 * 1024*1024) // rocksdb wal
OPTION(bluestore_block_wal_create, OPT_BOOL, false)
OPTION(bluestore_block_preallocate_file, OPT_BOOL, false) //whether preallocate space if block/db_path/wal_path is file rather that block device.
OPTION(bluestore_csum_type, OPT_STR, "crc32c") // none|xxhash32|xxhash64|crc32c|crc32c_16|crc32c_8
OPTION(bluestore_csum_min_block, OPT_U32, 4096)
OPTION(bluestore_csum_max_block, OPT_U32, 64*1024)
OPTION(bluestore_min_alloc_size, OPT_U32, 0)
OPTION(bluestore_min_alloc_size_hdd, OPT_U32, 64*1024)
OPTION(bluestore_min_alloc_size_ssd, OPT_U32, 16*1024)
OPTION(bluestore_max_alloc_size, OPT_U32, 0)
OPTION(bluestore_prefer_deferred_size, OPT_U32, 0)
OPTION(bluestore_prefer_deferred_size_hdd, OPT_U32, 32768)
OPTION(bluestore_prefer_deferred_size_ssd, OPT_U32, 0)
OPTION(bluestore_compression_mode, OPT_STR, "none")  // force|aggressive|passive|none
OPTION(bluestore_compression_algorithm, OPT_STR, "snappy")
OPTION(bluestore_compression_min_blob_size, OPT_U32, 0)
OPTION(bluestore_compression_min_blob_size_hdd, OPT_U32, 128*1024)
OPTION(bluestore_compression_min_blob_size_ssd, OPT_U32, 8*1024)
OPTION(bluestore_compression_max_blob_size, OPT_U32, 0)
OPTION(bluestore_compression_max_blob_size_hdd, OPT_U32, 512*1024)
OPTION(bluestore_compression_max_blob_size_ssd, OPT_U32, 64*1024)
/*
 * Specifies minimum expected amount of saved allocation units
 * per single blob to enable compressed blobs garbage collection
 * 
 */
OPTION(bluestore_gc_enable_blob_threshold, OPT_INT, 0)  
/*
 * Specifies minimum expected amount of saved allocation units
 * per all blobsb to enable compressed blobs garbage collection
 * 
 */
OPTION(bluestore_gc_enable_total_threshold, OPT_INT, 0)  

OPTION(bluestore_max_blob_size, OPT_U32, 0)
OPTION(bluestore_max_blob_size_hdd, OPT_U32, 512*1024)
OPTION(bluestore_max_blob_size_ssd, OPT_U32, 64*1024)
/*
 * Require the net gain of compression at least to be at this ratio,
 * otherwise we don't compress.
 * And ask for compressing at least 12.5%(1/8) off, by default.
 */
OPTION(bluestore_compression_required_ratio, OPT_DOUBLE, .875)
OPTION(bluestore_extent_map_shard_max_size, OPT_U32, 1200)
OPTION(bluestore_extent_map_shard_target_size, OPT_U32, 500)
OPTION(bluestore_extent_map_shard_min_size, OPT_U32, 150)
OPTION(bluestore_extent_map_shard_target_size_slop, OPT_DOUBLE, .2)
OPTION(bluestore_extent_map_inline_shard_prealloc_size, OPT_U32, 256)
OPTION(bluestore_cache_trim_interval, OPT_DOUBLE, .2)
OPTION(bluestore_cache_trim_max_skip_pinned, OPT_U32, 64) // skip this many onodes pinned in cache before we give up
OPTION(bluestore_cache_type, OPT_STR, "2q")   // lru, 2q
OPTION(bluestore_2q_cache_kin_ratio, OPT_DOUBLE, .5)    // kin page slot size / max page slot size
OPTION(bluestore_2q_cache_kout_ratio, OPT_DOUBLE, .5)   // number of kout page slot / total number of page slot
OPTION(bluestore_cache_size, OPT_U64, 1024*1024*1024)
OPTION(bluestore_cache_meta_ratio, OPT_DOUBLE, .7)
OPTION(bluestore_cache_kv_ratio, OPT_DOUBLE, .2)
OPTION(bluestore_kvbackend, OPT_STR, "rocksdb")
OPTION(bluestore_allocator, OPT_STR, "bitmap")     // stupid | bitmap
OPTION(bluestore_freelist_blocks_per_key, OPT_INT, 128)
OPTION(bluestore_bitmapallocator_blocks_per_zone, OPT_INT, 1024) // must be power of 2 aligned, e.g., 512, 1024, 2048...
OPTION(bluestore_bitmapallocator_span_size, OPT_INT, 1024) // must be power of 2 aligned, e.g., 512, 1024, 2048...
OPTION(bluestore_max_deferred_txc, OPT_U64, 32)
OPTION(bluestore_rocksdb_options, OPT_STR, "compression=kNoCompression,max_write_buffer_number=4,min_write_buffer_number_to_merge=1,recycle_log_file_num=4,write_buffer_size=268435456,writable_file_max_buffer_size=0,compaction_readahead_size=2097152")
OPTION(bluestore_fsck_on_mount, OPT_BOOL, false)
OPTION(bluestore_fsck_on_mount_deep, OPT_BOOL, true)
OPTION(bluestore_fsck_on_umount, OPT_BOOL, false)
OPTION(bluestore_fsck_on_umount_deep, OPT_BOOL, true)
OPTION(bluestore_fsck_on_mkfs, OPT_BOOL, true)
OPTION(bluestore_fsck_on_mkfs_deep, OPT_BOOL, false)
OPTION(bluestore_sync_submit_transaction, OPT_BOOL, false) // submit kv txn in queueing thread (not kv_sync_thread)
OPTION(bluestore_throttle_bytes, OPT_U64, 64*1024*1024)
OPTION(bluestore_throttle_deferred_bytes, OPT_U64, 128*1024*1024)
OPTION(bluestore_throttle_cost_per_io_hdd, OPT_U64, 670000)
OPTION(bluestore_throttle_cost_per_io_ssd, OPT_U64, 4000)
OPTION(bluestore_throttle_cost_per_io, OPT_U64, 0)
OPTION(bluestore_deferred_batch_ops, OPT_U64, 0)
OPTION(bluestore_deferred_batch_ops_hdd, OPT_U64, 64)
OPTION(bluestore_deferred_batch_ops_ssd, OPT_U64, 16)
OPTION(bluestore_nid_prealloc, OPT_INT, 1024)
OPTION(bluestore_blobid_prealloc, OPT_U64, 10240)
OPTION(bluestore_clone_cow, OPT_BOOL, true)  // do copy-on-write for clones
OPTION(bluestore_default_buffered_read, OPT_BOOL, true)
OPTION(bluestore_default_buffered_write, OPT_BOOL, false)
OPTION(bluestore_debug_misc, OPT_BOOL, false)
OPTION(bluestore_debug_no_reuse_blocks, OPT_BOOL, false)
OPTION(bluestore_debug_small_allocations, OPT_INT, 0)
OPTION(bluestore_debug_freelist, OPT_BOOL, false)
OPTION(bluestore_debug_prefill, OPT_FLOAT, 0)
OPTION(bluestore_debug_prefragment_max, OPT_INT, 1048576)
OPTION(bluestore_debug_inject_read_err, OPT_BOOL, false)
OPTION(bluestore_debug_randomize_serial_transaction, OPT_INT, 0)
OPTION(bluestore_debug_omit_block_device_write, OPT_BOOL, false)
OPTION(bluestore_debug_fsck_abort, OPT_BOOL, false)
OPTION(bluestore_debug_omit_kv_commit, OPT_BOOL, false)
OPTION(bluestore_debug_permit_any_bdev_label, OPT_BOOL, false)
OPTION(bluestore_shard_finishers, OPT_BOOL, false)

OPTION(kstore_max_ops, OPT_U64, 512)
OPTION(kstore_max_bytes, OPT_U64, 64*1024*1024)
OPTION(kstore_backend, OPT_STR, "rocksdb")
OPTION(kstore_rocksdb_options, OPT_STR, "compression=kNoCompression")
OPTION(kstore_rocksdb_bloom_bits_per_key, OPT_INT, 0)
OPTION(kstore_fsck_on_mount, OPT_BOOL, false)
OPTION(kstore_fsck_on_mount_deep, OPT_BOOL, true)
OPTION(kstore_nid_prealloc, OPT_U64, 1024)
OPTION(kstore_sync_transaction, OPT_BOOL, false)
OPTION(kstore_sync_submit_transaction, OPT_BOOL, false)
OPTION(kstore_onode_map_size, OPT_U64, 1024)
OPTION(kstore_cache_tails, OPT_BOOL, true)
OPTION(kstore_default_stripe_size, OPT_INT, 65536)

OPTION(filestore_omap_backend, OPT_STR, "rocksdb")
OPTION(filestore_omap_backend_path, OPT_STR, "")

/// filestore wb throttle limits
OPTION(filestore_wbthrottle_enable, OPT_BOOL, true)
OPTION(filestore_wbthrottle_btrfs_bytes_start_flusher, OPT_U64, 41943040)
OPTION(filestore_wbthrottle_btrfs_bytes_hard_limit, OPT_U64, 419430400)
OPTION(filestore_wbthrottle_btrfs_ios_start_flusher, OPT_U64, 500)
OPTION(filestore_wbthrottle_btrfs_ios_hard_limit, OPT_U64, 5000)
OPTION(filestore_wbthrottle_btrfs_inodes_start_flusher, OPT_U64, 500)
OPTION(filestore_wbthrottle_xfs_bytes_start_flusher, OPT_U64, 41943040)
OPTION(filestore_wbthrottle_xfs_bytes_hard_limit, OPT_U64, 419430400)
OPTION(filestore_wbthrottle_xfs_ios_start_flusher, OPT_U64, 500)
OPTION(filestore_wbthrottle_xfs_ios_hard_limit, OPT_U64, 5000)
OPTION(filestore_wbthrottle_xfs_inodes_start_flusher, OPT_U64, 500)

/// These must be less than the fd limit
OPTION(filestore_wbthrottle_btrfs_inodes_hard_limit, OPT_U64, 5000)
OPTION(filestore_wbthrottle_xfs_inodes_hard_limit, OPT_U64, 5000)

//Introduce a O_DSYNC write in the filestore
OPTION(filestore_odsync_write, OPT_BOOL, false)

// Tests index failure paths
OPTION(filestore_index_retry_probability, OPT_DOUBLE, 0)

// Allow object read error injection
OPTION(filestore_debug_inject_read_err, OPT_BOOL, false)

OPTION(filestore_debug_omap_check, OPT_BOOL, false) // Expensive debugging check on sync
OPTION(filestore_omap_header_cache_size, OPT_INT, 1024)

// Use omap for xattrs for attrs over
// filestore_max_inline_xattr_size or
OPTION(filestore_max_inline_xattr_size, OPT_U32, 0)     //Override
OPTION(filestore_max_inline_xattr_size_xfs, OPT_U32, 65536)
OPTION(filestore_max_inline_xattr_size_btrfs, OPT_U32, 2048)
OPTION(filestore_max_inline_xattr_size_other, OPT_U32, 512)

// for more than filestore_max_inline_xattrs attrs
OPTION(filestore_max_inline_xattrs, OPT_U32, 0) //Override
OPTION(filestore_max_inline_xattrs_xfs, OPT_U32, 10)
OPTION(filestore_max_inline_xattrs_btrfs, OPT_U32, 10)
OPTION(filestore_max_inline_xattrs_other, OPT_U32, 2)

// max xattr value size
OPTION(filestore_max_xattr_value_size, OPT_U32, 0)      //Override
OPTION(filestore_max_xattr_value_size_xfs, OPT_U32, 64<<10)
OPTION(filestore_max_xattr_value_size_btrfs, OPT_U32, 64<<10)
// ext4 allows 4k xattrs total including some smallish extra fields and the
// keys.  We're allowing 2 512 inline attrs in addition some some filestore
// replay attrs.  After accounting for those, we still need to fit up to
// two attrs of this value.  That means we need this value to be around 1k
// to be safe.  This is hacky, but it's not worth complicating the code
// to work around ext4's total xattr limit.
OPTION(filestore_max_xattr_value_size_other, OPT_U32, 1<<10)

OPTION(filestore_sloppy_crc, OPT_BOOL, false)         // track sloppy crcs
OPTION(filestore_sloppy_crc_block_size, OPT_INT, 65536)

OPTION(filestore_max_alloc_hint_size, OPT_U64, 1ULL << 20) // bytes

OPTION(filestore_max_sync_interval, OPT_DOUBLE, 5)    // seconds
OPTION(filestore_min_sync_interval, OPT_DOUBLE, .01)  // seconds
OPTION(filestore_btrfs_snap, OPT_BOOL, true)
OPTION(filestore_btrfs_clone_range, OPT_BOOL, true)
OPTION(filestore_zfs_snap, OPT_BOOL, false) // zfsonlinux is still unstable
OPTION(filestore_fsync_flushes_journal_data, OPT_BOOL, false)
OPTION(filestore_fiemap, OPT_BOOL, false)     // (try to) use fiemap
OPTION(filestore_punch_hole, OPT_BOOL, false)
OPTION(filestore_seek_data_hole, OPT_BOOL, false)     // (try to) use seek_data/hole
OPTION(filestore_splice, OPT_BOOL, false)
OPTION(filestore_fadvise, OPT_BOOL, true)
//collect device partition information for management application to use
OPTION(filestore_collect_device_partition_information, OPT_BOOL, true)

// (try to) use extsize for alloc hint NOTE: extsize seems to trigger
// data corruption in xfs prior to kernel 3.5.  filestore will
// implicity disable this if it cannot confirm the kernel is newer
// than that.
// NOTE: This option involves a tradeoff: When disabled, fragmentation is
// worse, but large sequential writes are faster. When enabled, large
// sequential writes are slower, but fragmentation is reduced.
OPTION(filestore_xfs_extsize, OPT_BOOL, false)

OPTION(filestore_journal_parallel, OPT_BOOL, false)
OPTION(filestore_journal_writeahead, OPT_BOOL, false)
OPTION(filestore_journal_trailing, OPT_BOOL, false)
OPTION(filestore_queue_max_ops, OPT_U64, 50)
OPTION(filestore_queue_max_bytes, OPT_U64, 100 << 20)

OPTION(filestore_caller_concurrency, OPT_INT, 10)

/// Expected filestore throughput in B/s
OPTION(filestore_expected_throughput_bytes, OPT_DOUBLE, 200 << 20)
/// Expected filestore throughput in ops/s
OPTION(filestore_expected_throughput_ops, OPT_DOUBLE, 200)

/// Filestore max delay multiple.  Defaults to 0 (disabled)
OPTION(filestore_queue_max_delay_multiple, OPT_DOUBLE, 0)
/// Filestore high delay multiple.  Defaults to 0 (disabled)
OPTION(filestore_queue_high_delay_multiple, OPT_DOUBLE, 0)

/// Use above to inject delays intended to keep the op queue between low and high
OPTION(filestore_queue_low_threshhold, OPT_DOUBLE, 0.3)
OPTION(filestore_queue_high_threshhold, OPT_DOUBLE, 0.9)

OPTION(filestore_op_threads, OPT_INT, 2)
OPTION(filestore_op_thread_timeout, OPT_INT, 60)
OPTION(filestore_op_thread_suicide_timeout, OPT_INT, 180)
OPTION(filestore_commit_timeout, OPT_FLOAT, 600)
OPTION(filestore_fiemap_threshold, OPT_INT, 4096)
OPTION(filestore_merge_threshold, OPT_INT, 10)
OPTION(filestore_split_multiple, OPT_INT, 2)
OPTION(filestore_update_to, OPT_INT, 1000)
OPTION(filestore_blackhole, OPT_BOOL, false)     // drop any new transactions on the floor
OPTION(filestore_fd_cache_size, OPT_INT, 128)    // FD lru size
OPTION(filestore_fd_cache_shards, OPT_INT, 16)   // FD number of shards
OPTION(filestore_ondisk_finisher_threads, OPT_INT, 1)
OPTION(filestore_apply_finisher_threads, OPT_INT, 1)
OPTION(filestore_dump_file, OPT_STR, "")         // file onto which store transaction dumps
OPTION(filestore_kill_at, OPT_INT, 0)            // inject a failure at the n'th opportunity
OPTION(filestore_inject_stall, OPT_INT, 0)       // artificially stall for N seconds in op queue thread
OPTION(filestore_fail_eio, OPT_BOOL, true)       // fail/crash on EIO
OPTION(filestore_debug_verify_split, OPT_BOOL, false)
OPTION(journal_dio, OPT_BOOL, true)
OPTION(journal_aio, OPT_BOOL, true)
OPTION(journal_force_aio, OPT_BOOL, false)
OPTION(journal_block_size, OPT_INT, 4096)

// max bytes to search ahead in journal searching for corruption
OPTION(journal_max_corrupt_search, OPT_U64, 10<<20)
OPTION(journal_block_align, OPT_BOOL, true)
OPTION(journal_write_header_frequency, OPT_U64, 0)
OPTION(journal_max_write_bytes, OPT_INT, 10 << 20)
OPTION(journal_max_write_entries, OPT_INT, 100)

/// Target range for journal fullness
OPTION(journal_throttle_low_threshhold, OPT_DOUBLE, 0.6)
OPTION(journal_throttle_high_threshhold, OPT_DOUBLE, 0.9)

/// Multiple over expected at high_threshhold. Defaults to 0 (disabled).
OPTION(journal_throttle_high_multiple, OPT_DOUBLE, 0)
/// Multiple over expected at max.  Defaults to 0 (disabled).
OPTION(journal_throttle_max_multiple, OPT_DOUBLE, 0)

OPTION(journal_align_min_size, OPT_INT, 64 << 10)  // align data payloads >= this.
OPTION(journal_replay_from, OPT_INT, 0)
OPTION(journal_zero_on_create, OPT_BOOL, false)
OPTION(journal_ignore_corruption, OPT_BOOL, false) // assume journal is not corrupt
OPTION(journal_discard, OPT_BOOL, false) //using ssd disk as journal, whether support discard nouse journal-data.

OPTION(fio_dir, OPT_STR, "/tmp/fio") // fio data directory for fio-objectstore

OPTION(rados_mon_op_timeout, OPT_DOUBLE, 0) // how many seconds to wait for a response from the monitor before returning an error from a rados operation. 0 means no limit.
OPTION(rados_osd_op_timeout, OPT_DOUBLE, 0) // how many seconds to wait for a response from osds before returning an error from a rados operation. 0 means no limit.
OPTION(rados_tracing, OPT_BOOL, false) // true if LTTng-UST tracepoints should be enabled

OPTION(rbd_op_threads, OPT_INT, 1)
OPTION(rbd_op_thread_timeout, OPT_INT, 60)
OPTION(rbd_non_blocking_aio, OPT_BOOL, true) // process AIO ops from a worker thread to prevent blocking
OPTION(rbd_cache, OPT_BOOL, true) // whether to enable caching (writeback unless rbd_cache_max_dirty is 0)
OPTION(rbd_cache_writethrough_until_flush, OPT_BOOL, true) // whether to make writeback caching writethrough until flush is called, to be sure the user of librbd will send flushs so that writeback is safe
OPTION(rbd_cache_size, OPT_LONGLONG, 32<<20)         // cache size in bytes
OPTION(rbd_cache_max_dirty, OPT_LONGLONG, 24<<20)    // dirty limit in bytes - set to 0 for write-through caching
OPTION(rbd_cache_target_dirty, OPT_LONGLONG, 16<<20) // target dirty limit in bytes
OPTION(rbd_cache_max_dirty_age, OPT_FLOAT, 1.0)      // seconds in cache before writeback starts
OPTION(rbd_cache_max_dirty_object, OPT_INT, 0)       // dirty limit for objects - set to 0 for auto calculate from rbd_cache_size
OPTION(rbd_cache_block_writes_upfront, OPT_BOOL, false) // whether to block writes to the cache before the aio_write call completes (true), or block before the aio completion is called (false)
OPTION(rbd_concurrent_management_ops, OPT_INT, 10) // how many operations can be in flight for a management operation like deleting or resizing an image
OPTION(rbd_balance_snap_reads, OPT_BOOL, false)
OPTION(rbd_localize_snap_reads, OPT_BOOL, false)
OPTION(rbd_balance_parent_reads, OPT_BOOL, false)
OPTION(rbd_localize_parent_reads, OPT_BOOL, true)
OPTION(rbd_readahead_trigger_requests, OPT_INT, 10) // number of sequential requests necessary to trigger readahead
OPTION(rbd_readahead_max_bytes, OPT_LONGLONG, 512 * 1024) // set to 0 to disable readahead
OPTION(rbd_readahead_disable_after_bytes, OPT_LONGLONG, 50 * 1024 * 1024) // how many bytes are read in total before readahead is disabled
OPTION(rbd_clone_copy_on_read, OPT_BOOL, false)
OPTION(rbd_blacklist_on_break_lock, OPT_BOOL, true) // whether to blacklist clients whose lock was broken
OPTION(rbd_blacklist_expire_seconds, OPT_INT, 0) // number of seconds to blacklist - set to 0 for OSD default
OPTION(rbd_request_timed_out_seconds, OPT_INT, 30) // number of seconds before maint request times out
OPTION(rbd_skip_partial_discard, OPT_BOOL, false) // when trying to discard a range inside an object, set to true to skip zeroing the range.
OPTION(rbd_enable_alloc_hint, OPT_BOOL, true) // when writing a object, it will issue a hint to osd backend to indicate the expected size object need
OPTION(rbd_tracing, OPT_BOOL, false) // true if LTTng-UST tracepoints should be enabled
OPTION(rbd_blkin_trace_all, OPT_BOOL, false) // create a blkin trace for all RBD requests
OPTION(rbd_validate_pool, OPT_BOOL, true) // true if empty pools should be validated for RBD compatibility
OPTION(rbd_validate_names, OPT_BOOL, true) // true if image specs should be validated
OPTION(rbd_auto_exclusive_lock_until_manual_request, OPT_BOOL, true) // whether to automatically acquire/release exclusive lock until it is explicitly requested, i.e. before we know the user of librbd is properly using the lock API
OPTION(rbd_mirroring_resync_after_disconnect, OPT_BOOL, false) // automatically start image resync after mirroring is disconnected due to being laggy
OPTION(rbd_mirroring_replay_delay, OPT_INT, 0) // time-delay in seconds for rbd-mirror asynchronous replication

OPTION(rbd_default_pool, OPT_STR, "rbd") // default pool for storing images
OPTION_VALIDATOR(rbd_default_pool)

/*
 * The following options change the behavior for librbd's image creation methods that
 * don't require all of the parameters. These are provided so that older programs
 * can take advantage of newer features without being rewritten to use new versions
 * of the image creation functions.
 *
 * rbd_create()/RBD::create() are affected by all of these options.
 *
 * rbd_create2()/RBD::create2() and rbd_clone()/RBD::clone() are affected by:
 * - rbd_default_order
 * - rbd_default_stripe_count
 * - rbd_default_stripe_size
 *
 * rbd_create3()/RBD::create3() and rbd_clone2/RBD::clone2() are only
 * affected by rbd_default_order.
 */
OPTION(rbd_default_format, OPT_INT, 2)
OPTION(rbd_default_order, OPT_INT, 22)
OPTION(rbd_default_stripe_count, OPT_U64, 0) // changing requires stripingv2 feature
OPTION(rbd_default_stripe_unit, OPT_U64, 0) // changing to non-object size requires stripingv2 feature
OPTION(rbd_default_data_pool, OPT_STR, "") // optional default pool for storing image data blocks
OPTION_VALIDATOR(rbd_default_data_pool)

/**
 * RBD features are only applicable for v2 images. This setting accepts either
 * an integer bitmask value or comma-delimited string of RBD feature names.
 * This setting is always internally stored as an integer bitmask value. The
 * mapping between feature bitmask value and feature name is as follows:
 *
 *  +1 -> layering
 *  +2 -> striping
 *  +4 -> exclusive-lock
 *  +8 -> object-map
 *  +16 -> fast-diff
 *  +32 -> deep-flatten
 *  +64 -> journaling
 *  +128 -> data-pool
 */
SAFE_OPTION(rbd_default_features, OPT_STR, "layering,exclusive-lock,object-map,fast-diff,deep-flatten")
OPTION_VALIDATOR(rbd_default_features)

OPTION(rbd_default_map_options, OPT_STR, "") // default rbd map -o / --options

/**
 * RBD journal options.
 */
OPTION(rbd_journal_order, OPT_U32, 24) // bits to shift to compute journal object max size, between 12 and 64
OPTION(rbd_journal_splay_width, OPT_U32, 4) // number of active journal objects
OPTION(rbd_journal_commit_age, OPT_DOUBLE, 5) // commit time interval, seconds
OPTION(rbd_journal_object_flush_interval, OPT_INT, 0) // maximum number of pending commits per journal object
OPTION(rbd_journal_object_flush_bytes, OPT_INT, 0) // maximum number of pending bytes per journal object
OPTION(rbd_journal_object_flush_age, OPT_DOUBLE, 0) // maximum age (in seconds) for pending commits
OPTION(rbd_journal_pool, OPT_STR, "") // pool for journal objects
OPTION(rbd_journal_max_payload_bytes, OPT_U32, 16384) // maximum journal payload size before splitting
OPTION(rbd_journal_max_concurrent_object_sets, OPT_INT, 0) // maximum number of object sets a journal client can be behind before it is automatically unregistered

/**
 * RBD Mirror options
 */
OPTION(rbd_mirror_journal_commit_age, OPT_DOUBLE, 5) // commit time interval, seconds
OPTION(rbd_mirror_journal_poll_age, OPT_DOUBLE, 5) // maximum age (in seconds) between successive journal polls
OPTION(rbd_mirror_journal_max_fetch_bytes, OPT_U32, 32768) // maximum bytes to read from each journal data object per fetch
OPTION(rbd_mirror_sync_point_update_age, OPT_DOUBLE, 30) // number of seconds between each update of the image sync point object number
OPTION(rbd_mirror_concurrent_image_syncs, OPT_U32, 5) // maximum number of image syncs in parallel
OPTION(rbd_mirror_pool_replayers_refresh_interval, OPT_INT, 30) // interval to refresh peers in rbd-mirror daemon
OPTION(rbd_mirror_delete_retry_interval, OPT_DOUBLE, 30) // interval to check and retry the failed requests in deleter
OPTION(rbd_mirror_image_state_check_interval, OPT_INT, 30) // interval to get images from pool watcher and set sources in replayer
OPTION(rbd_mirror_leader_heartbeat_interval, OPT_INT, 5) // interval (in seconds) between mirror leader heartbeats
OPTION(rbd_mirror_leader_max_missed_heartbeats, OPT_INT, 2) // number of missed heartbeats for non-lock owner to attempt to acquire lock
OPTION(rbd_mirror_leader_max_acquire_attempts_before_break, OPT_INT, 3) // number of failed attempts to acquire lock after missing heartbeats before breaking lock

OPTION(nss_db_path, OPT_STR, "") // path to nss db


OPTION(rgw_max_chunk_size, OPT_INT, 4 * 1024 * 1024)
OPTION(rgw_put_obj_min_window_size, OPT_INT, 16 * 1024 * 1024)
OPTION(rgw_put_obj_max_window_size, OPT_INT, 64 * 1024 * 1024)
OPTION(rgw_max_put_size, OPT_U64, 5ULL*1024*1024*1024)
OPTION(rgw_max_put_param_size, OPT_U64, 1 * 1024 * 1024) // max input size for PUT requests accepting json/xml params

/**
 * override max bucket index shards in zone configuration (if not zero)
 *
 * Represents the number of shards for the bucket index object, a value of zero
 * indicates there is no sharding. By default (no sharding, the name of the object
 * is '.dir.{marker}', with sharding, the name is '.dir.{markder}.{sharding_id}',
 * sharding_id is zero-based value. It is not recommended to set a too large value
 * (e.g. thousand) as it increases the cost for bucket listing.
 */
OPTION(rgw_override_bucket_index_max_shards, OPT_U32, 0)

/**
 * Represents the maximum AIO pending requests for the bucket index object shards.
 */
OPTION(rgw_bucket_index_max_aio, OPT_U32, 8)

/**
 * whether or not the quota/gc threads should be started
 */
OPTION(rgw_enable_quota_threads, OPT_BOOL, true)
OPTION(rgw_enable_gc_threads, OPT_BOOL, true)
OPTION(rgw_enable_lc_threads, OPT_BOOL, true)


OPTION(rgw_data, OPT_STR, "/var/lib/ceph/radosgw/$cluster-$id")
OPTION(rgw_enable_apis, OPT_STR, "s3, s3website, swift, swift_auth, admin")
OPTION(rgw_cache_enabled, OPT_BOOL, true)   // rgw cache enabled
OPTION(rgw_cache_lru_size, OPT_INT, 10000)   // num of entries in rgw cache
OPTION(rgw_socket_path, OPT_STR, "")   // path to unix domain socket, if not specified, rgw will not run as external fcgi
OPTION(rgw_host, OPT_STR, "")  // host for radosgw, can be an IP, default is 0.0.0.0
OPTION(rgw_port, OPT_STR, "")  // port to listen, format as "8080" "5000", if not specified, rgw will not run external fcgi
OPTION(rgw_dns_name, OPT_STR, "") // hostname suffix on buckets
OPTION(rgw_dns_s3website_name, OPT_STR, "") // hostname suffix on buckets for s3-website endpoint
OPTION(rgw_content_length_compat, OPT_BOOL, false) // Check both HTTP_CONTENT_LENGTH and CONTENT_LENGTH in fcgi env
OPTION(rgw_lifecycle_work_time, OPT_STR, "00:00-06:00") //job process lc  at 00:00-06:00s
OPTION(rgw_lc_lock_max_time, OPT_INT, 60)  // total run time for a single lc processor work
OPTION(rgw_lc_max_objs, OPT_INT, 32)
OPTION(rgw_lc_debug_interval, OPT_INT, -1)  // Debug run interval, in seconds
OPTION(rgw_script_uri, OPT_STR, "") // alternative value for SCRIPT_URI if not set in request
OPTION(rgw_request_uri, OPT_STR,  "") // alternative value for REQUEST_URI if not set in request
OPTION(rgw_swift_url, OPT_STR, "")             // the swift url, being published by the internal swift auth
OPTION(rgw_swift_url_prefix, OPT_STR, "swift") // entry point for which a url is considered a swift url
OPTION(rgw_swift_auth_url, OPT_STR, "")        // default URL to go and verify tokens for v1 auth (if not using internal swift auth)
OPTION(rgw_swift_auth_entry, OPT_STR, "auth")  // entry point for which a url is considered a swift auth url
OPTION(rgw_swift_tenant_name, OPT_STR, "")  // tenant name to use for swift access
OPTION(rgw_swift_account_in_url, OPT_BOOL, false)  // assume that URL always contain the account (aka tenant) part
OPTION(rgw_swift_enforce_content_length, OPT_BOOL, false)  // enforce generation of Content-Length even in cost of performance or scalability
OPTION(rgw_keystone_url, OPT_STR, "")  // url for keystone server
OPTION(rgw_keystone_admin_token, OPT_STR, "")  // keystone admin token (shared secret)
OPTION(rgw_keystone_admin_user, OPT_STR, "")  // keystone admin user name
OPTION(rgw_keystone_admin_password, OPT_STR, "")  // keystone admin user password
OPTION(rgw_keystone_admin_tenant, OPT_STR, "")  // keystone admin user tenant (for keystone v2.0)
OPTION(rgw_keystone_admin_project, OPT_STR, "")  // keystone admin user project (for keystone v3)
OPTION(rgw_keystone_admin_domain, OPT_STR, "")  // keystone admin user domain
OPTION(rgw_keystone_barbican_user, OPT_STR, "")  // keystone user to access barbican secrets
OPTION(rgw_keystone_barbican_password, OPT_STR, "")  // keystone password for barbican user
OPTION(rgw_keystone_barbican_tenant, OPT_STR, "")  // keystone barbican user tenant (for keystone v2.0)
OPTION(rgw_keystone_barbican_project, OPT_STR, "")  // keystone barbican user project (for keystone v3)
OPTION(rgw_keystone_barbican_domain, OPT_STR, "")  // keystone barbican user domain
OPTION(rgw_keystone_api_version, OPT_INT, 2) // Version of Keystone API to use (2 or 3)
OPTION(rgw_keystone_accepted_roles, OPT_STR, "Member, admin")  // roles required to serve requests
OPTION(rgw_keystone_accepted_admin_roles, OPT_STR, "") // list of roles allowing an user to gain admin privileges
OPTION(rgw_keystone_token_cache_size, OPT_INT, 10000)  // max number of entries in keystone token cache
OPTION(rgw_keystone_revocation_interval, OPT_INT, 15 * 60)  // seconds between tokens revocation check
OPTION(rgw_keystone_verify_ssl, OPT_BOOL, true) // should we try to verify keystone's ssl
OPTION(rgw_keystone_implicit_tenants, OPT_BOOL, false)  // create new users in their own tenants of the same name
OPTION(rgw_cross_domain_policy, OPT_STR, "<allow-access-from domain=\"*\" secure=\"false\" />")
OPTION(rgw_healthcheck_disabling_path, OPT_STR, "") // path that existence causes the healthcheck to respond 503
OPTION(rgw_s3_auth_use_rados, OPT_BOOL, true)  // should we try to use the internal credentials for s3?
OPTION(rgw_s3_auth_use_keystone, OPT_BOOL, false)  // should we try to use keystone for s3?
OPTION(rgw_s3_auth_aws4_force_boto2_compat, OPT_BOOL, true) // force aws4 auth boto2 compatibility
OPTION(rgw_barbican_url, OPT_STR, "")  // url for barbican server

/* OpenLDAP-style LDAP parameter strings */
/* rgw_ldap_uri  space-separated list of LDAP servers in URI format */
OPTION(rgw_ldap_uri, OPT_STR, "ldaps://<ldap.your.domain>")
/* rgw_ldap_binddn  LDAP entry RGW will bind with (user match) */
OPTION(rgw_ldap_binddn, OPT_STR, "uid=admin,cn=users,dc=example,dc=com")
/* rgw_ldap_searchdn  LDAP search base (basedn) */
OPTION(rgw_ldap_searchdn, OPT_STR, "cn=users,cn=accounts,dc=example,dc=com")
/* rgw_ldap_dnattr  LDAP attribute containing RGW user names (to form binddns)*/
OPTION(rgw_ldap_dnattr, OPT_STR, "uid")
/* rgw_ldap_secret  file containing credentials for rgw_ldap_binddn */
OPTION(rgw_ldap_secret, OPT_STR, "/etc/openldap/secret")
/* rgw_s3_auth_use_ldap  use LDAP for RGW auth? */
OPTION(rgw_s3_auth_use_ldap, OPT_BOOL, false)
/* rgw_ldap_searchfilter  LDAP search filter */
OPTION(rgw_ldap_searchfilter, OPT_STR, "")

OPTION(rgw_admin_entry, OPT_STR, "admin")  // entry point for which a url is considered an admin request
OPTION(rgw_enforce_swift_acls, OPT_BOOL, true)
OPTION(rgw_swift_token_expiration, OPT_INT, 24 * 3600) // time in seconds for swift token expiration
OPTION(rgw_print_continue, OPT_BOOL, true)  // enable if 100-Continue works
OPTION(rgw_print_prohibited_content_length, OPT_BOOL, false) // violate RFC 7230 and send Content-Length in 204 and 304
OPTION(rgw_remote_addr_param, OPT_STR, "REMOTE_ADDR")  // e.g. X-Forwarded-For, if you have a reverse proxy
OPTION(rgw_op_thread_timeout, OPT_INT, 10*60)
OPTION(rgw_op_thread_suicide_timeout, OPT_INT, 0)
OPTION(rgw_thread_pool_size, OPT_INT, 100)
OPTION(rgw_num_control_oids, OPT_INT, 8)
OPTION(rgw_num_rados_handles, OPT_U32, 1)
OPTION(rgw_verify_ssl, OPT_BOOL, true) // should http_client try to verify ssl when sent https request

/* The following are tunables for caches of RGW NFS (and other file
 * client) objects.
 *
 * The file handle cache is a partitioned hash table
 * (fhcache_partitions), each with a closed hash part and backing
 * b-tree mapping.  The number of partions is expected to be a small
 * prime, the cache size something larger but less than 5K, the total
 * size of the cache is n_part * cache_size.
 */
OPTION(rgw_nfs_lru_lanes, OPT_INT, 5)
OPTION(rgw_nfs_lru_lane_hiwat, OPT_INT, 911)
OPTION(rgw_nfs_fhcache_partitions, OPT_INT, 3)
OPTION(rgw_nfs_fhcache_size, OPT_INT, 2017) /* 3*2017=6051 */
OPTION(rgw_nfs_namespace_expire_secs, OPT_INT, 300) /* namespace invalidate
                                                     * timer */
OPTION(rgw_nfs_max_gc, OPT_INT, 300) /* max gc events per cycle */
OPTION(rgw_nfs_write_completion_interval_s, OPT_INT, 10) /* stateless (V3)
                                                          * commit
                                                          * delay */

OPTION(rgw_zone, OPT_STR, "") // zone name
OPTION(rgw_zone_root_pool, OPT_STR, ".rgw.root")    // pool where zone specific info is stored
OPTION(rgw_default_zone_info_oid, OPT_STR, "default.zone")  // oid where default zone info is stored
OPTION(rgw_region, OPT_STR, "") // region name
OPTION(rgw_region_root_pool, OPT_STR, ".rgw.root")  // pool where all region info is stored
OPTION(rgw_default_region_info_oid, OPT_STR, "default.region")  // oid where default region info is stored
OPTION(rgw_zonegroup, OPT_STR, "") // zone group name
OPTION(rgw_zonegroup_root_pool, OPT_STR, ".rgw.root")  // pool where all zone group info is stored
OPTION(rgw_default_zonegroup_info_oid, OPT_STR, "default.zonegroup")  // oid where default zone group info is stored
OPTION(rgw_realm, OPT_STR, "") // realm name
OPTION(rgw_realm_root_pool, OPT_STR, ".rgw.root")  // pool where all realm info is stored
OPTION(rgw_default_realm_info_oid, OPT_STR, "default.realm")  // oid where default realm info is stored
OPTION(rgw_period_root_pool, OPT_STR, ".rgw.root")  // pool where all period info is stored
OPTION(rgw_period_latest_epoch_info_oid, OPT_STR, ".latest_epoch") // oid where current period info is stored
OPTION(rgw_log_nonexistent_bucket, OPT_BOOL, false)
OPTION(rgw_log_object_name, OPT_STR, "%Y-%m-%d-%H-%i-%n")      // man date to see codes (a subset are supported)
OPTION(rgw_log_object_name_utc, OPT_BOOL, false)
OPTION(rgw_usage_max_shards, OPT_INT, 32)
OPTION(rgw_usage_max_user_shards, OPT_INT, 1)
OPTION(rgw_enable_ops_log, OPT_BOOL, false) // enable logging every rgw operation
OPTION(rgw_enable_usage_log, OPT_BOOL, false) // enable logging bandwidth usage
OPTION(rgw_ops_log_rados, OPT_BOOL, true) // whether ops log should go to rados
OPTION(rgw_ops_log_socket_path, OPT_STR, "") // path to unix domain socket where ops log can go
OPTION(rgw_ops_log_data_backlog, OPT_INT, 5 << 20) // max data backlog for ops log
OPTION(rgw_fcgi_socket_backlog, OPT_INT, 1024) // socket  backlog for fcgi
OPTION(rgw_usage_log_flush_threshold, OPT_INT, 1024) // threshold to flush pending log data
OPTION(rgw_usage_log_tick_interval, OPT_INT, 30) // flush pending log data every X seconds
OPTION(rgw_intent_log_object_name, OPT_STR, "%Y-%m-%d-%i-%n")  // man date to see codes (a subset are supported)
OPTION(rgw_intent_log_object_name_utc, OPT_BOOL, false)
OPTION(rgw_init_timeout, OPT_INT, 300) // time in seconds
OPTION(rgw_mime_types_file, OPT_STR, "/etc/mime.types")
OPTION(rgw_gc_max_objs, OPT_INT, 32)
OPTION(rgw_gc_obj_min_wait, OPT_INT, 2 * 3600)    // wait time before object may be handled by gc
OPTION(rgw_gc_processor_max_time, OPT_INT, 3600)  // total run time for a single gc processor work
OPTION(rgw_gc_processor_period, OPT_INT, 3600)  // gc processor cycle time
OPTION(rgw_s3_success_create_obj_status, OPT_INT, 0) // alternative success status response for create-obj (0 - default)
OPTION(rgw_resolve_cname, OPT_BOOL, false)  // should rgw try to resolve hostname as a dns cname record
OPTION(rgw_obj_stripe_size, OPT_INT, 4 << 20)
OPTION(rgw_extended_http_attrs, OPT_STR, "") // list of extended attrs that can be set on objects (beyond the default)
OPTION(rgw_exit_timeout_secs, OPT_INT, 120) // how many seconds to wait for process to go down before exiting unconditionally
OPTION(rgw_get_obj_window_size, OPT_INT, 16 << 20) // window size in bytes for single get obj request
OPTION(rgw_get_obj_max_req_size, OPT_INT, 4 << 20) // max length of a single get obj rados op
OPTION(rgw_relaxed_s3_bucket_names, OPT_BOOL, false) // enable relaxed bucket name rules for US region buckets
OPTION(rgw_defer_to_bucket_acls, OPT_STR, "") // if the user has bucket perms, use those before key perms (recurse and full_control)
OPTION(rgw_list_buckets_max_chunk, OPT_INT, 1000) // max buckets to retrieve in a single op when listing user buckets
OPTION(rgw_md_log_max_shards, OPT_INT, 64) // max shards for metadata log
OPTION(rgw_num_zone_opstate_shards, OPT_INT, 128) // max shards for keeping inter-region copy progress info
OPTION(rgw_opstate_ratelimit_sec, OPT_INT, 30) // min time between opstate updates on a single upload (0 for disabling ratelimit)
OPTION(rgw_curl_wait_timeout_ms, OPT_INT, 1000) // timeout for certain curl calls
OPTION(rgw_copy_obj_progress, OPT_BOOL, true) // should dump progress during long copy operations?
OPTION(rgw_copy_obj_progress_every_bytes, OPT_INT, 1024 * 1024) // min bytes between copy progress output
OPTION(rgw_obj_tombstone_cache_size, OPT_INT, 1000) // how many objects in tombstone cache, which is used in multi-zone sync to keep
                                                    // track of removed objects' mtime

OPTION(rgw_data_log_window, OPT_INT, 30) // data log entries window (in seconds)
OPTION(rgw_data_log_changes_size, OPT_INT, 1000) // number of in-memory entries to hold for data changes log
OPTION(rgw_data_log_num_shards, OPT_INT, 128) // number of objects to keep data changes log on
OPTION(rgw_data_log_obj_prefix, OPT_STR, "data_log") //
OPTION(rgw_replica_log_obj_prefix, OPT_STR, "replica_log") //

OPTION(rgw_bucket_quota_ttl, OPT_INT, 600) // time for cached bucket stats to be cached within rgw instance
OPTION(rgw_bucket_quota_soft_threshold, OPT_DOUBLE, 0.95) // threshold from which we don't rely on cached info for quota decisions
OPTION(rgw_bucket_quota_cache_size, OPT_INT, 10000) // number of entries in bucket quota cache
OPTION(rgw_bucket_default_quota_max_objects, OPT_INT, -1) // number of objects allowed
OPTION(rgw_bucket_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in bytes

OPTION(rgw_expose_bucket, OPT_BOOL, false) // Return the bucket name in the 'Bucket' response header

OPTION(rgw_frontends, OPT_STR, "civetweb port=7480") // rgw front ends

OPTION(rgw_user_quota_bucket_sync_interval, OPT_INT, 180) // time period for accumulating modified buckets before syncing stats
OPTION(rgw_user_quota_sync_interval, OPT_INT, 3600 * 24) // time period for accumulating modified buckets before syncing entire user stats
OPTION(rgw_user_quota_sync_idle_users, OPT_BOOL, false) // whether stats for idle users be fully synced
OPTION(rgw_user_quota_sync_wait_time, OPT_INT, 3600 * 24) // min time between two full stats sync for non-idle users
OPTION(rgw_user_default_quota_max_objects, OPT_INT, -1) // number of objects allowed
OPTION(rgw_user_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in bytes

OPTION(rgw_multipart_min_part_size, OPT_INT, 5 * 1024 * 1024) // min size for each part (except for last one) in multipart upload
OPTION(rgw_multipart_part_upload_limit, OPT_INT, 10000) // parts limit in multipart upload

OPTION(rgw_max_slo_entries, OPT_INT, 1000) // default number of max entries in slo

OPTION(rgw_olh_pending_timeout_sec, OPT_INT, 3600) // time until we retire a pending olh change
OPTION(rgw_user_max_buckets, OPT_INT, 1000) // global option to set max buckets count for all user

OPTION(rgw_objexp_gc_interval, OPT_U32, 60 * 10) // maximum time between round of expired objects garbage collecting
OPTION(rgw_objexp_time_step, OPT_U32, 4096) // number of seconds for rounding the timestamps
OPTION(rgw_objexp_hints_num_shards, OPT_U32, 127) // maximum number of parts in which the hint index is stored in
OPTION(rgw_objexp_chunk_size, OPT_U32, 100) // maximum number of entries in a single operation when processing objexp data

OPTION(rgw_enable_static_website, OPT_BOOL, false) // enable static website feature
OPTION(rgw_log_http_headers, OPT_STR, "" ) // list of HTTP headers to log when seen, ignores case (e.g., http_x_forwarded_for

OPTION(rgw_num_async_rados_threads, OPT_INT, 32) // num of threads to use for async rados operations
OPTION(rgw_md_notify_interval_msec, OPT_INT, 200) // metadata changes notification interval to followers
OPTION(rgw_run_sync_thread, OPT_BOOL, true) // whether radosgw (not radosgw-admin) spawns the sync thread
OPTION(rgw_sync_lease_period, OPT_INT, 120) // time in second for lease that rgw takes on a specific log (or log shard)
OPTION(rgw_sync_log_trim_interval, OPT_INT, 1200) // time in seconds between attempts to trim sync logs

OPTION(rgw_sync_data_inject_err_probability, OPT_DOUBLE, 0) // range [0, 1]
OPTION(rgw_sync_meta_inject_err_probability, OPT_DOUBLE, 0) // range [0, 1]


OPTION(rgw_period_push_interval, OPT_DOUBLE, 2) // seconds to wait before retrying "period push"
OPTION(rgw_period_push_interval_max, OPT_DOUBLE, 30) // maximum interval after exponential backoff

OPTION(rgw_safe_max_objects_per_shard, OPT_INT, 100*1024) // safe max loading
OPTION(rgw_shard_warning_threshold, OPT_DOUBLE, 90) // pct of safe max
                                                    // at which to warn

OPTION(rgw_swift_versioning_enabled, OPT_BOOL, false) // whether swift object versioning feature is enabled

OPTION(mgr_module_path, OPT_STR, CEPH_PKGLIBDIR "/mgr") // where to load python modules from
OPTION(mgr_modules, OPT_STR, "restful")  // Which modules to load
OPTION(mgr_data, OPT_STR, "/var/lib/ceph/mgr/$cluster-$id") // where to find keyring etc
OPTION(mgr_tick_period, OPT_INT, 2)  // How frequently to tick
OPTION(mgr_stats_period, OPT_INT, 5) // How frequently clients send stats
OPTION(mgr_client_bytes, OPT_U64, 128*1048576) // bytes from clients
OPTION(mgr_client_messages, OPT_U64, 512)      // messages from clients
OPTION(mgr_osd_bytes, OPT_U64, 512*1048576)   // bytes from osds
OPTION(mgr_osd_messages, OPT_U64, 8192)       // messages from osds
OPTION(mgr_mds_bytes, OPT_U64, 128*1048576)   // bytes from mdss
OPTION(mgr_mds_messages, OPT_U64, 128)        // messages from mdss
OPTION(mgr_mon_bytes, OPT_U64, 128*1048576)   // bytes from mons
OPTION(mgr_mon_messages, OPT_U64, 128)        // messages from mons

OPTION(mgr_connect_retry_interval, OPT_DOUBLE, 1.0)

OPTION(mon_mgr_digest_period, OPT_INT, 5)  // How frequently to send digests
OPTION(mon_mgr_beacon_grace, OPT_INT, 30)  // How long to wait to failover
OPTION(mon_mgr_inactive_grace, OPT_INT, 60) // How long before health WARN -> ERR
OPTION(rgw_crypt_require_ssl, OPT_BOOL, true) // requests including encryption key headers must be sent over ssl
OPTION(rgw_crypt_default_encryption_key, OPT_STR, "") // base64 encoded key for encryption of rgw objects
OPTION(rgw_crypt_s3_kms_encryption_keys, OPT_STR, "") // extra keys that may be used for aws:kms
                                                      // defined as map "key1=YmluCmJvb3N0CmJvb3N0LQ== key2=b3V0CnNyYwpUZXN0aW5nCg=="
OPTION(rgw_crypt_suppress_logs, OPT_BOOL, true)   // suppress logs that might print customer key
OPTION(rgw_list_bucket_min_readahead, OPT_INT, 1000) // minimum number of entries to read from rados for bucket listing

OPTION(rgw_rest_getusage_op_compat, OPT_BOOL, false) // dump description of total stats for s3 GetUsage API

OPTION(mutex_perf_counter, OPT_BOOL, false) // enable/disable mutex perf counter
OPTION(throttler_perf_counter, OPT_BOOL, true) // enable/disable throttler perf counter

/* The following are tunables for torrent data */
OPTION(rgw_torrent_flag, OPT_BOOL, false)    // produce torrent function flag
OPTION(rgw_torrent_tracker, OPT_STR, "")    // torrent field annouce and annouce list
OPTION(rgw_torrent_createby, OPT_STR, "")    // torrent field created by
OPTION(rgw_torrent_comment, OPT_STR, "")    // torrent field comment
OPTION(rgw_torrent_encoding, OPT_STR, "")    // torrent field encoding
OPTION(rgw_torrent_origin, OPT_STR, "")    // torrent origin
OPTION(rgw_torrent_sha_unit, OPT_INT, 512*1024)    // torrent field piece length 512K

OPTION(event_tracing, OPT_BOOL, false) // true if LTTng-UST tracepoints should be enabled

// This will be set to true when it is safe to start threads.
// Once it is true, it will never change.
OPTION(internal_safe_to_start_threads, OPT_BOOL, false)

OPTION(debug_deliberately_leak_memory, OPT_BOOL, false)

OPTION(rgw_swift_custom_header, OPT_STR, "") // option to enable swift custom headers

/* resharding tunables */
OPTION(rgw_reshard_num_logs, OPT_INT, 16)
OPTION(rgw_reshard_bucket_lock_duration, OPT_INT, 120) // duration of lock on bucket obj during resharding
OPTION(rgw_dynamic_resharding, OPT_BOOL, true)
OPTION(rgw_max_objs_per_shard, OPT_INT, 100000)
OPTION(rgw_reshard_thread_interval, OPT_U32, 60 * 10) // maximum time between rounds of reshard thread processing