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zdb: show dedup table and log attributes

Browse Source 
There's interesting info in there that is going to help with
understanding dedup behavior at any given moment.

Since this is a format change, tests that rely on that output have been
modified to match.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Closes #16755
This commit is contained in:
Rob Norris 2024-11-27 11:28:19 +11:00 committed by Brian Behlendorf
parent a1907b038a
commit 1aee375947
7 changed files with 97 additions and 36 deletions
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107
cmd/zdb/zdb.c
View File

@ -1967,17 +1967,53 @@ dump_dedup_ratio(const ddt_stat_t *dds)
static void
dump_ddt_log(ddt_t *ddt)
{
if (ddt->ddt_version != DDT_VERSION_FDT ||
!(ddt->ddt_flags & DDT_FLAG_LOG))
return;
for (int n = 0; n < 2; n++) {
ddt_log_t *ddl = &ddt->ddt_log[n];
char flagstr[64] = {0};
if (ddl->ddl_flags > 0) {
flagstr[0] = ' ';
int c = 1;
if (ddl->ddl_flags & DDL_FLAG_FLUSHING)
c += strlcpy(&flagstr[c], " FLUSHING",
sizeof (flagstr) - c);
if (ddl->ddl_flags & DDL_FLAG_CHECKPOINT)
c += strlcpy(&flagstr[c], " CHECKPOINT",
sizeof (flagstr) - c);
if (ddl->ddl_flags &
~(DDL_FLAG_FLUSHING|DDL_FLAG_CHECKPOINT))
c += strlcpy(&flagstr[c], " UNKNOWN",
sizeof (flagstr) - c);
flagstr[1] = '[';
flagstr[c++] = ']';
}
uint64_t count = avl_numnodes(&ddl->ddl_tree);
if (count == 0)
continue;
printf(DMU_POOL_DDT_LOG ": %lu log entries\n",
zio_checksum_table[ddt->ddt_checksum].ci_name, n, count);
printf(DMU_POOL_DDT_LOG ": flags=0x%02x%s; obj=%llu; "
"len=%llu; txg=%llu; entries=%llu\n",
zio_checksum_table[ddt->ddt_checksum].ci_name, n,
ddl->ddl_flags, flagstr,
(u_longlong_t)ddl->ddl_object,
(u_longlong_t)ddl->ddl_length,
(u_longlong_t)ddl->ddl_first_txg, (u_longlong_t)count);
if (dump_opt['D'] < 4)
if (ddl->ddl_flags & DDL_FLAG_CHECKPOINT) {
const ddt_key_t *ddk = &ddl->ddl_checkpoint;
printf(" checkpoint: "
"%016llx:%016llx:%016llx:%016llx:%016llx\n",
(u_longlong_t)ddk->ddk_cksum.zc_word[0],
(u_longlong_t)ddk->ddk_cksum.zc_word[1],
(u_longlong_t)ddk->ddk_cksum.zc_word[2],
(u_longlong_t)ddk->ddk_cksum.zc_word[3],
(u_longlong_t)ddk->ddk_prop);
}
if (count == 0 || dump_opt['D'] < 4)
continue;
ddt_lightweight_entry_t ddlwe;
@ -1991,7 +2027,7 @@ dump_ddt_log(ddt_t *ddt)
}
static void
dump_ddt(ddt_t *ddt, ddt_type_t type, ddt_class_t class)
dump_ddt_object(ddt_t *ddt, ddt_type_t type, ddt_class_t class)
{
char name[DDT_NAMELEN];
ddt_lightweight_entry_t ddlwe;
@ -2016,11 +2052,8 @@ dump_ddt(ddt_t *ddt, ddt_type_t type, ddt_class_t class)
ddt_object_name(ddt, type, class, name);
(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
name,
(u_longlong_t)count,
(u_longlong_t)dspace,
(u_longlong_t)mspace);
(void) printf("%s: dspace=%llu; mspace=%llu; entries=%llu\n", name,
(u_longlong_t)dspace, (u_longlong_t)mspace, (u_longlong_t)count);
if (dump_opt['D'] < 3)
return;
@ -2043,24 +2076,52 @@ dump_ddt(ddt_t *ddt, ddt_type_t type, ddt_class_t class)
(void) printf("\n");
}
static void
dump_ddt(ddt_t *ddt)
{
if (!ddt || ddt->ddt_version == DDT_VERSION_UNCONFIGURED)
return;
char flagstr[64] = {0};
if (ddt->ddt_flags > 0) {
flagstr[0] = ' ';
int c = 1;
if (ddt->ddt_flags & DDT_FLAG_FLAT)
c += strlcpy(&flagstr[c], " FLAT",
sizeof (flagstr) - c);
if (ddt->ddt_flags & DDT_FLAG_LOG)
c += strlcpy(&flagstr[c], " LOG",
sizeof (flagstr) - c);
if (ddt->ddt_flags & ~DDT_FLAG_MASK)
c += strlcpy(&flagstr[c], " UNKNOWN",
sizeof (flagstr) - c);
flagstr[1] = '[';
flagstr[c] = ']';
}
printf("DDT-%s: version=%llu [%s]; flags=0x%02llx%s; rootobj=%llu\n",
zio_checksum_table[ddt->ddt_checksum].ci_name,
(u_longlong_t)ddt->ddt_version,
(ddt->ddt_version == 0) ? "LEGACY" :
(ddt->ddt_version == 1) ? "FDT" : "UNKNOWN",
(u_longlong_t)ddt->ddt_flags, flagstr,
(u_longlong_t)ddt->ddt_dir_object);
for (ddt_type_t type = 0; type < DDT_TYPES; type++)
for (ddt_class_t class = 0; class < DDT_CLASSES; class++)
dump_ddt_object(ddt, type, class);
dump_ddt_log(ddt);
}
static void
dump_all_ddts(spa_t *spa)
{
ddt_histogram_t ddh_total = {{{0}}};
ddt_stat_t dds_total = {0};
for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
ddt_t *ddt = spa->spa_ddt[c];
if (!ddt || ddt->ddt_version == DDT_VERSION_UNCONFIGURED)
continue;
for (ddt_type_t type = 0; type < DDT_TYPES; type++) {
for (ddt_class_t class = 0; class < DDT_CLASSES;
class++) {
dump_ddt(ddt, type, class);
}
}
dump_ddt_log(ddt);
}
for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++)
dump_ddt(spa->spa_ddt[c]);
ddt_get_dedup_stats(spa, &dds_total);

4
tests/zfs-tests/tests/functional/dedup/dedup_fdt_create.ksh
View File

@ -70,7 +70,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "active"
# four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# single containing object in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256 | wc -l) -eq 1
@ -84,7 +84,7 @@ log_must cp /$TESTPOOL/file1 /$TESTPOOL/file2
log_must zpool sync
# now four entries in the duplicate table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate:.*entries=4'"
# now two DDT ZAPs in the container object; DDT ZAPs aren't cleaned up until
# the entire logical table is destroyed

4
tests/zfs-tests/tests/functional/dedup/dedup_fdt_import.ksh
View File

@ -70,7 +70,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "active"
# four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# single containing object in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256 | wc -l) -eq 1
@ -107,7 +107,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "active"
# four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# single containing object in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256 | wc -l) -eq 1

4
tests/zfs-tests/tests/functional/dedup/dedup_legacy_create.ksh
View File

@ -63,7 +63,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "disabled"
# should be four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# should be just one DDT ZAP in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256-zap- | wc -l) -eq 1
@ -73,7 +73,7 @@ log_must cp /$TESTPOOL/file1 /$TESTPOOL/file2
log_must zpool sync
# now four entries in the duplicate table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate:.*entries=4'"
# now two DDT ZAPs in the MOS; DDT ZAPs aren't cleaned up until the entire
# logical table is destroyed

4
tests/zfs-tests/tests/functional/dedup/dedup_legacy_fdt_mixed.ksh
View File

@ -71,7 +71,7 @@ log_must dd if=/dev/urandom of=/$TESTPOOL/ds1/file1 bs=128k count=4
log_must zpool sync
# should be four entries in the skein unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-skein-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-skein-zap-unique:.*entries=4'"
# should be just one DDT ZAP in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-.*-zap- | wc -l) -eq 1
@ -90,7 +90,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "active"
# now also four entries in the blake3 unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-blake3-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-blake3-zap-unique:.*entries=4'"
# two entries in the MOS: the legacy skein DDT ZAP, and the containing dir for
# the blake3 FDT table

6
tests/zfs-tests/tests/functional/dedup/dedup_legacy_fdt_upgrade.ksh
View File

@ -71,7 +71,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "disabled"
# should be four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# should be just one DDT ZAP in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256-zap- | wc -l) -eq 1
@ -90,7 +90,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "enabled"
# now four entries in the duplicate table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-duplicate:.*entries=4'"
# now two DDT ZAPs in the MOS; DDT ZAPs aren't cleaned up until the entire
# logical table is destroyed
@ -117,7 +117,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "active"
# four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# single containing object in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256 | wc -l) -eq 1

4
tests/zfs-tests/tests/functional/dedup/dedup_legacy_import.ksh
View File

@ -63,7 +63,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "disabled"
# should be four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# should be just one DDT ZAP in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256-zap- | wc -l) -eq 1
@ -96,7 +96,7 @@ log_must zpool sync
log_must test $(get_pool_prop feature@fast_dedup $TESTPOOL) = "disabled"
# should be four entries in the unique table
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique: 4 entries'"
log_must eval "zdb -D $TESTPOOL | grep -q 'DDT-sha256-zap-unique:.*entries=4'"
# should be just one DDT ZAP in the MOS
log_must test $(zdb -dddd $TESTPOOL 1 | grep DDT-sha256-zap- | wc -l) -eq 1