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Add DDT prune command

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Requires the new 'flat' physical data which has the start
time for a class entry.

The amount to prune can be based on a target percentage of
the unique entries or based on the age (i.e., every entry
older than N days).

Sponsored-by: Klara, Inc.
Sponsored-by: iXsystems, Inc.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Don Brady <don.brady@klarasystems.com>
Closes #16277
This commit is contained in:
Don Brady
2024-06-17 22:35:18 +00:00
committed by Brian Behlendorf
parent 4a4f7b019f
commit d4d79451cb
21 changed files with 905 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/ztest.c
+28
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@@ -276,6 +276,8 @@ extern unsigned long zio_decompress_fail_fraction;
extern unsigned long zfs_reconstruct_indirect_damage_fraction;
extern uint64_t raidz_expand_max_reflow_bytes;
extern uint_t raidz_expand_pause_point;
extern boolean_t ddt_prune_artificial_age;
extern boolean_t ddt_dump_prune_histogram;
static ztest_shared_opts_t *ztest_shared_opts;
@@ -446,6 +448,7 @@ ztest_func_t ztest_fletcher;
ztest_func_t ztest_fletcher_incr;
ztest_func_t ztest_verify_dnode_bt;
ztest_func_t ztest_pool_prefetch_ddt;
ztest_func_t ztest_ddt_prune;
static uint64_t zopt_always = 0ULL * NANOSEC; /* all the time */
static uint64_t zopt_incessant = 1ULL * NANOSEC / 10; /* every 1/10 second */
@@ -502,6 +505,7 @@ static ztest_info_t ztest_info[] = {
ZTI_INIT(ztest_fletcher_incr, 1, &zopt_rarely),
ZTI_INIT(ztest_verify_dnode_bt, 1, &zopt_sometimes),
ZTI_INIT(ztest_pool_prefetch_ddt, 1, &zopt_rarely),
ZTI_INIT(ztest_ddt_prune, 1, &zopt_rarely),
};
#define ZTEST_FUNCS (sizeof (ztest_info) / sizeof (ztest_info_t))
@@ -7288,6 +7292,17 @@ ztest_trim(ztest_ds_t *zd, uint64_t id)
mutex_exit(&ztest_vdev_lock);
}
void
ztest_ddt_prune(ztest_ds_t *zd, uint64_t id)
{
(void) zd, (void) id;
spa_t *spa = ztest_spa;
uint64_t pct = ztest_random(15) + 1;
(void) ddt_prune_unique_entries(spa, ZPOOL_DDT_PRUNE_PERCENTAGE, pct);
}
/*
* Verify pool integrity by running zdb.
*/
@@ -7469,6 +7484,13 @@ ztest_resume_thread(void *arg)
{
spa_t *spa = arg;
/*
* Synthesize aged DDT entries for ddt prune testing
*/
ddt_prune_artificial_age = B_TRUE;
if (ztest_opts.zo_verbose >= 3)
ddt_dump_prune_histogram = B_TRUE;
while (!ztest_exiting) {
if (spa_suspended(spa))
ztest_resume(spa);
@@ -8587,6 +8609,12 @@ ztest_init(ztest_shared_t *zs)
if (i == SPA_FEATURE_LOG_SPACEMAP && ztest_random(4) == 0)
continue;
/*
* split 50/50 between legacy and fast dedup
*/
if (i == SPA_FEATURE_FAST_DEDUP && ztest_random(2) != 0)
continue;
VERIFY3S(-1, !=, asprintf(&buf, "feature@%s",
spa_feature_table[i].fi_uname));
fnvlist_add_uint64(props, buf, 0);