tests/zfs-tests/tests/functional/mmp/mmp_on_uberblocks.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # This file and its contents are supplied under the terms of the
   6 # Common Development and Distribution License ("CDDL"), version 1.0.
   7 # You may only use this file in accordance with the terms of version
   8 # 1.0 of the CDDL.
   9 #
  10 # A full copy of the text of the CDDL should have accompanied this
  11 # source.  A copy of the CDDL is also available via the Internet at
  12 # http://www.illumos.org/license/CDDL.
  13 #
  14 # CDDL HEADER END
  15 #
  16
  17 #
  18 # Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
  19 #
  20
  21 # DESCRIPTION:
  22 #       Ensure that MMP updates uberblocks at the expected intervals.
  23 #
  24 # STRATEGY:
  25 #       1. Set zfs_txg_timeout to large value
  26 #       2. Create a zpool
  27 #       3. Clear multihost history
  28 #       4. Sleep, then collect count of uberblocks written
  29 #       5. If number of changes seen is less than min threshold, then fail
  30 #       6. If number of changes seen is more than max threshold, then fail
  31 #
  32
  33 . $STF_SUITE/include/libtest.shlib
  34 . $STF_SUITE/tests/functional/mmp/mmp.cfg
  35 . $STF_SUITE/tests/functional/mmp/mmp.kshlib
  36
  37 verify_runnable "both"
  38
  39 UBER_CHANGES=0
  40 EXPECTED=$(($(echo $DISKS | wc -w) * 10))
  41 FUDGE=$((EXPECTED * 20 / 100))
  42 MIN=$((EXPECTED - FUDGE))
  43 MAX=$((EXPECTED + FUDGE))
  44
  45 function cleanup
  46 {
  47         default_cleanup_noexit
  48         set_tunable64 zfs_txg_timeout $TXG_TIMEOUT_DEFAULT
  49         log_must mmp_clear_hostid
  50 }
  51
  52 log_assert "Ensure MMP uberblocks update at the correct interval"
  53 log_onexit cleanup
  54
  55 log_must set_tunable64 zfs_txg_timeout $TXG_TIMEOUT_LONG
  56 log_must mmp_set_hostid $HOSTID1
  57
  58 default_setup_noexit "$DISKS"
  59 log_must zpool set multihost=on $TESTPOOL
  60 clear_mmp_history
  61 UBER_CHANGES=$(count_uberblocks $TESTPOOL 10)
  62
  63 log_note "Uberblock changed $UBER_CHANGES times"
  64
  65 if [ $UBER_CHANGES -lt $MIN ]; then
  66         log_fail "Fewer uberblock writes occured than expected ($EXPECTED)"
  67 fi
  68
  69 if [ $UBER_CHANGES -gt $MAX ]; then
  70         log_fail "More uberblock writes occured than expected ($EXPECTED)"
  71 fi
  72
  73 log_pass "Ensure MMP uberblocks update at the correct interval passed"