::
- fs new <file system name> <metadata pool name> <data pool name>
+ ceph fs new <file system name> <metadata pool name> <data pool name>
This command creates a new file system. The file system name and metadata pool
name are self-explanatory. The specified data pool is the default data pool and
::
- fs ls
+ ceph fs ls
List all file systems by name.
::
- fs lsflags <file system name>
+ ceph fs lsflags <file system name>
List all the flags set on a file system.
::
- fs dump [epoch]
+ ceph fs dump [epoch]
This dumps the FSMap at the given epoch (default: current) which includes all
file system settings, MDS daemons and the ranks they hold, and the list of
::
- fs rm <file system name> [--yes-i-really-mean-it]
+ ceph fs rm <file system name> [--yes-i-really-mean-it]
Destroy a CephFS file system. This wipes information about the state of the
file system from the FSMap. The metadata pool and data pools are untouched and
::
- fs get <file system name>
+ ceph fs get <file system name>
Get information about the named file system, including settings and ranks. This
-is a subset of the same information from the ``fs dump`` command.
+is a subset of the same information from the ``ceph fs dump`` command.
::
- fs set <file system name> <var> <val>
+ ceph fs set <file system name> <var> <val>
Change a setting on a file system. These settings are specific to the named
file system and do not affect other file systems.
::
- fs add_data_pool <file system name> <pool name/id>
+
ceph fs add_data_pool <file system name> <pool name/id>
Add a data pool to the file system. This pool can be used for file layouts
as an alternate location to store file data.
::
- fs rm_data_pool <file system name> <pool name/id>
+
ceph fs rm_data_pool <file system name> <pool name/id>
This command removes the specified pool from the list of data pools for the
file system. If any files have layouts for the removed data pool, the file
::
- fs rename <file system name> <new file system name> [--yes-i-really-mean-it]
+ ceph fs rename <file system name> <new file system name> [--yes-i-really-mean-it]
Rename a Ceph file system. This also changes the application tags on the data
pools and metadata pool of the file system to the new file system name.
::
- fs set <fs name> max_file_size <size in bytes>
+ ceph fs set <fs name> max_file_size <size in bytes>
CephFS has a configurable maximum file size, and it's 1TB by default.
You may wish to set this limit higher if you expect to store large files
::
- fs set <fs_name> down true
+ ceph fs set <fs_name> down true
To bring the cluster back online:
::
- fs set <fs_name> down false
+ ceph fs set <fs_name> down false
This will also restore the previous value of max_mds. MDS daemons are brought
down in a way such that journals are flushed to the metadata pool and all
-----------------------------------------------------------------
To allow rapidly deleting a file system (for testing) or to quickly bring the
-file system and MDS daemons down, use the ``fs fail`` command:
+file system and MDS daemons down, use the ``ceph fs fail`` command:
::
- fs fail <fs_name>
+ ceph fs fail <fs_name>
This command sets a file system flag to prevent standbys from
activating on the file system (the ``joinable`` flag).
::
- fs set <fs_name> joinable false
+ ceph fs set <fs_name> joinable false
Then the operator can fail all of the ranks which causes the MDS daemons to
respawn as standbys. The file system will be left in a degraded state.
::
# For all ranks, 0-N:
- mds fail <fs_name>:<n>
+ ceph mds fail <fs_name>:<n>
Once all ranks are inactive, the file system may also be deleted or left in
this state for other purposes (perhaps disaster recovery).
::
- fs set <fs_name> joinable true
+ ceph fs set <fs_name> joinable true
Daemons
::
- mds fail <gid/name/role>
+ ceph mds fail <gid/name/role>
Mark an MDS daemon as failed. This is equivalent to what the cluster
would do if an MDS daemon had failed to send a message to the mon
for ``mds_beacon_grace`` second. If the daemon was active and a suitable
-standby is available, using ``mds fail`` will force a failover to the standby.
+standby is available, using ``ceph mds fail`` will force a failover to the
+standby.
-If the MDS daemon was in reality still running, then using ``mds fail``
+If the MDS daemon was in reality still running, then using ``ceph mds fail``
will cause the daemon to restart. If it was active and a standby was
available, then the "failed" daemon will return as a standby.
::
- tell mds.<daemon name> command ...
+ ceph tell mds.<daemon name> command ...
Send a command to the MDS daemon(s). Use ``mds.*`` to send a command to all
daemons. Use ``ceph tell mds.* help`` to learn available commands.
::
- mds metadata <gid/name/role>
+ ceph mds metadata <gid/name/role>
Get metadata about the given MDS known to the Monitors.
::
- mds repaired <role>
+ ceph mds repaired <role>
Mark the file system rank as repaired. Unlike the name suggests, this command
does not change a MDS; it manipulates the file system rank which has been
::
- fs required_client_features <fs name> add reply_encoding
- fs required_client_features <fs name> rm reply_encoding
+ ceph fs required_client_features <fs name> add reply_encoding
+ ceph fs required_client_features <fs name> rm reply_encoding
To list all CephFS features
::
- fs feature ls
+ ceph fs feature ls
Clients that are missing newly added features will be evicted automatically.
::
- fs flag set <flag name> <flag val> [<confirmation string>]
+ ceph fs flag set <flag name> <flag val> [<confirmation string>]
Sets a global CephFS flag (i.e. not specific to a particular file system).
Currently, the only flag setting is 'enable_multiple' which allows having
::
- mds rmfailed
+ ceph mds rmfailed
This removes a rank from the failed set.
::
- fs reset <file system name>
+ ceph fs reset <file system name>
This command resets the file system state to defaults, except for the name and
pools. Non-zero ranks are saved in the stopped set.
::
- fs new <file system name> <metadata pool name> <data pool name> --fscid <fscid> --force
+ ceph fs new <file system name> <metadata pool name> <data pool name> --fscid <fscid> --force
This command creates a file system with a specific **fscid** (file system cluster ID).
You may want to do this when an application expects the file system's ID to be
projects / ceph.git / blobdiff