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
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.
18 # Copyright (c) 2020, George Amanakis. All rights reserved.
21 . $STF_SUITE/include/libtest.shlib
22 . $STF_SUITE/tests/functional/persist_l2arc/persist_l2arc.cfg
26 # Persistent L2ARC with an unencrypted ZFS file system succeeds
29 # 1. Create pool with a cache device.
30 # 2. Export and re-import pool without writing any data.
31 # 3. Create a random file in that pool and random read for 30 sec.
33 # 5. Read the amount of log blocks written from the header of the
36 # 7. Read the amount of log blocks rebuilt in arcstats and compare to
38 # 8. Check if the labels of the L2ARC device are intact.
40 # * We can predict the minimum bytes of L2ARC restored if we subtract
41 # from the effective size of the cache device the bytes l2arc_evict()
43 # l2: L2ARC device size - VDEV_LABEL_START_SIZE - l2ad_dev_hdr_asize
44 # wr_sz: l2arc_write_max + l2arc_write_boost (worst case)
45 # blk_overhead: wr_sz / SPA_MINBLOCKSIZE / (l2 / SPA_MAXBLOCKSIZE) *
46 # sizeof (l2arc_log_blk_phys_t)
47 # min restored size: l2 - (wr_sz + blk_overhead)
50 verify_runnable "global"
52 log_assert "Persistent L2ARC with an unencrypted ZFS file system succeeds."
56 if poolexists $TESTPOOL ; then
57 destroy_pool $TESTPOOL
60 log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch
61 log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE \
62 $rebuild_blocks_min_l2size
66 # L2ARC_NOPREFETCH is set to 0 to let L2ARC handle prefetches
67 typeset noprefetch=$(get_tunable L2ARC_NOPREFETCH)
68 typeset rebuild_blocks_min_l2size=$(get_tunable L2ARC_REBUILD_BLOCKS_MIN_L2SIZE)
69 log_must set_tunable32 L2ARC_NOPREFETCH 0
70 log_must set_tunable32 L2ARC_REBUILD_BLOCKS_MIN_L2SIZE 0
73 typeset cache_sz=$(( floor($fill_mb / 2) ))
74 export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
76 log_must truncate -s ${cache_sz}M $VDEV_CACHE
78 log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
80 log_must zpool export $TESTPOOL
81 log_must zpool import -d $VDIR $TESTPOOL
83 log_must fio $FIO_SCRIPTS/mkfiles.fio
84 log_must fio $FIO_SCRIPTS/random_reads.fio
86 log_must zpool export $TESTPOOL
88 typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
91 typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
93 log_must zpool import -d $VDIR $TESTPOOL
97 typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
99 log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
100 log_must test $l2_dh_log_blk -gt 0
102 log_must zdb -lll $VDEV_CACHE
104 log_must zpool destroy -f $TESTPOOL
106 log_pass "Persistent L2ARC with an unencrypted ZFS file system succeeds."