1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#!/bin/ksh -p
#
# CDDL HEADER START
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#
# CDDL HEADER END
#
#
# Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
#
# DESCRIPTION:
# Verify MMP writes are distributed evenly among leaves
#
# STRATEGY:
# 1. Create an asymmetric mirrored pool
# 2. Enable multihost and multihost_history
# 3. Delay for MMP writes to occur
# 4. Verify the MMP writes are distributed evenly across leaf vdevs
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/mmp/mmp.cfg
. $STF_SUITE/tests/functional/mmp/mmp.kshlib
verify_runnable "both"
function cleanup
{
log_must zpool destroy $MMP_POOL
log_must rm $MMP_DIR/file.{0,1,2,3,4,5,6,7}
log_must rm $MMP_HISTORY_TMP
log_must rmdir $MMP_DIR
log_must mmp_clear_hostid
}
log_assert "mmp writes are evenly distributed across leaf vdevs"
log_onexit cleanup
MMP_HISTORY_TMP=$MMP_DIR/history
MMP_HISTORY=/proc/spl/kstat/zfs/$MMP_POOL/multihost
# Step 1
log_must mkdir -p $MMP_DIR
log_must truncate -s 128M $MMP_DIR/file.{0,1,2,3,4,5,6,7}
log_must zpool create -f $MMP_POOL mirror $MMP_DIR/file.{0,1} mirror $MMP_DIR/file.{2,3,4,5,6,7}
# Step 2
log_must mmp_set_hostid $HOSTID1
log_must zpool set multihost=on $MMP_POOL
set_tunable64 MULTIHOST_HISTORY 0
set_tunable64 MULTIHOST_HISTORY 40
# Step 3
# default settings, every leaf written once/second
sleep 4
# Step 4
typeset -i min_writes=999
typeset -i max_writes=0
typeset -i write_count
# copy to get as close to a consistent view as possible
cat $MMP_HISTORY > $MMP_HISTORY_TMP
for x in $(seq 0 7); do
write_count=$(grep -c file.${x} $MMP_HISTORY_TMP)
if [ $write_count -lt $min_writes ]; then
min_writes=$write_count
fi
if [ $write_count -gt $max_writes ]; then
max_writes=$write_count
fi
done
log_note "mmp min_writes $min_writes max_writes $max_writes"
if [ $min_writes -lt 1 ]; then
log_fail "mmp writes were not counted correctly"
fi
if [ $((max_writes - min_writes)) -gt 1 ]; then
log_fail "mmp writes were not evenly distributed across leaf vdevs"
fi
log_pass "mmp writes were evenly distributed across leaf vdevs"
|
