blob: b8d13e22c523e2047fc6c4aa79bd83c4b81c0807 (
plain)
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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
#! /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) 2015, 2016 by Delphix. All rights reserved.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/tests/functional/removal/removal.kshlib
default_setup_noexit "$DISKS"
function cleanup
{
log_must set_min_bytes 131072
default_cleanup_noexit
}
log_onexit cleanup
log_must set_min_bytes 1
log_must zfs set recordsize=512 $TESTPOOL/$TESTFS
#
# Create a large file so that we know some of the blocks will be on the
# removed device, and hence eligible for remapping.
#
log_must dd if=/dev/urandom of=$TESTDIR/file bs=$((2**12)) count=$((2**9))
#
# Randomly rewrite some of blocks in the file so that there will be holes and
# we will not be able to remap the entire file in a few huge chunks.
#
for i in $(seq $((2**12))); do
#
# We have to sync periodically so that all the writes don't end up in
# the same txg. If they were all in the same txg, only the last write
# would go through and we would not have as many allocations to
# fragment the file.
#
((i % 100 > 0 )) || sync || log_fail "Could not sync."
random_write $TESTDIR/file $((2**9)) || \
log_fail "Could not random write."
done
#
# Remap should quietly succeed as a noop before a removal.
#
log_must zfs remap $TESTPOOL/$TESTFS
remaptxg_before=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS)
(( $? == 0 )) || log_fail "Could not get remaptxg."
[[ $remaptxg_before == "-" ]] || \
log_fail "remaptxg ($remaptxg_before) had value before a removal"
log_must zpool remove $TESTPOOL $REMOVEDISK
log_must wait_for_removal $TESTPOOL
log_mustnot vdevs_in_pool $TESTPOOL $REMOVEDISK
#
# remaptxg should not be set if we haven't done a remap.
#
remaptxg_before=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS)
(( $? == 0 )) || log_fail "Could not get remaptxg."
[[ $remaptxg_before == "-" ]] || \
log_fail "remaptxg ($remaptxg_before) had value before a removal"
mapping_size_before=$(indirect_vdev_mapping_size $TESTPOOL)
log_must zfs remap $TESTPOOL/$TESTFS
# Try to wait for a condense to finish.
for i in {1..5}; do
sleep 5
sync
done
mapping_size_after=$(indirect_vdev_mapping_size $TESTPOOL)
#
# After the remap, there should not be very many blocks referenced. The reason
# why our threshold is as high as 512 is because our ratio of metadata to
# user data is relatively high, with only 64M of user data on the file system.
#
(( mapping_size_after < mapping_size_before )) || \
log_fail "Mapping size did not decrease after remap: " \
"$mapping_size_before before to $mapping_size_after after."
(( mapping_size_after < 512 )) || \
log_fail "Mapping size not small enough after remap: " \
"$mapping_size_before before to $mapping_size_after after."
#
# After a remap, the remaptxg should be set to a non-zero value.
#
remaptxg_after=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS)
(( $? == 0 )) || log_fail "Could not get remaptxg."
log_note "remap txg after remap is $remaptxg_after"
(( remaptxg_after > 0 )) || log_fail "remaptxg not increased"
#
# Remap should quietly succeed as a noop if there have been no removals since
# the last remap.
#
log_must zfs remap $TESTPOOL/$TESTFS
remaptxg_again=$(zfs get -H -o value remaptxg $TESTPOOL/$TESTFS)
(( $? == 0 )) || log_fail "Could not get remaptxg."
log_note "remap txg after second remap is $remaptxg_again"
(( remaptxg_again == remaptxg_after )) || \
log_fail "remap not noop if there has been no removal"
log_pass "Remapping a fs caused mapping size to decrease."
|
