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mirror_zfs/module/zfs
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Alexander Motin 600a02b884
Improve log spacemap load time 
Previous flushing algorithm limited only total number of log blocks to
the minimum of 256K and 4x number of metaslabs in the pool.  As result,
system with 1500 disks with 1000 metaslabs each, touching several new
metaslabs each TXG could grow spacemap log to huge size without much
benefits.  We've observed one of such systems importing pool for about
45 minutes.

This patch improves the situation from five sides:
 - By limiting maximum period for each metaslab to be flushed to 1000
TXGs, that effectively limits maximum number of per-TXG spacemap logs
to load to the same number.
 - By making flushing more smooth via accounting number of metaslabs
that were touched after the last flush and actually need another flush,
not just ms_unflushed_txg bump.
 - By applying zfs_unflushed_log_block_pct to the number of metaslabs
that were touched after the last flush, not all metaslabs in the pool.
 - By aggressively prefetching per-TXG spacemap logs up to 16 TXGs in
advance, making log spacemap load process for wide HDD pool CPU-bound,
accelerating it by many times.
 - By reducing zfs_unflushed_log_block_max from 256K to 128K, reducing
single-threaded by nature log processing time from ~10 to ~5 minutes.

As further optimization we could skip bumping ms_unflushed_txg for
metaslabs not touched since the last flush, but that would be an
incompatible change, requiring new pool feature.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #12789
2022-04-26 10:44:21 -07:00
..
abd.c Rename fallthrough to zfs_fallthrough 2022-02-15 08:58:59 -08:00
aggsum.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
arc.c Improve the inline descriptions of the ARC module parameters 2022-04-20 13:16:25 -07:00
blkptr.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
bplist.c Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
bptree.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
bqueue.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dataset_kstats.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dbuf_stats.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
dbuf.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
ddt_zap.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
ddt.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dmu_diff.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
dmu_object.c Introduce CPU_SEQID_UNSTABLE 2020-11-02 11:51:12 -08:00
dmu_objset.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dmu_recv.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
dmu_redact.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
dmu_send.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
dmu_traverse.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dmu_tx.c module: mark arguments used 2022-02-18 09:34:03 -08:00
dmu_zfetch.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
dmu.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
dnode_sync.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dnode.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dsl_bookmark.c module: zfs: dsl_bookmark: silence false-positive maybe-uninitialised 2022-03-28 10:03:13 -07:00
dsl_crypt.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dsl_dataset.c Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
dsl_deadlist.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dsl_deleg.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
dsl_destroy.c Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
dsl_dir.c Fix ENOSPC when unlinking multiple files from full pool 2022-03-08 09:16:35 -08:00
dsl_pool.c Fix ENOSPC when unlinking multiple files from full pool 2022-03-08 09:16:35 -08:00
dsl_prop.c Rename fallthrough to zfs_fallthrough 2022-02-15 08:58:59 -08:00
dsl_scan.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
dsl_synctask.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
dsl_userhold.c Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
edonr_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
fm.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
gzip.c Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h> 2022-03-15 15:13:48 -07:00
hkdf.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
lz4_zfs.c Updated the lz4 decompressor 2022-01-07 10:36:49 -08:00
lz4.c lz4: Cherrypick fix for CVE-2021-3520 2022-01-12 16:14:36 -08:00
lzjb.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
metaslab.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
mmp.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
multilist.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
range_tree.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
refcount.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
rrwlock.c Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
sha256.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
skein_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_boot.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
spa_checkpoint.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_config.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
spa_errlog.c Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
spa_history.c module: mark arguments used 2022-02-18 09:34:03 -08:00
spa_log_spacemap.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
spa_misc.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_stats.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
spa.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
space_map.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
space_reftree.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
txg.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
uberblock.c MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
unique.c Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
vdev_cache.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
vdev_draid_rand.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_draid.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect_births.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect_mapping.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_initialize.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
vdev_label.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_mirror.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
vdev_missing.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
vdev_queue.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
vdev_raidz_math_aarch64_neon_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_aarch64_neon.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neonx2.c Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_avx512bw.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_raidz_math_avx512f.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_impl.h Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_raidz_math_powerpc_altivec_common.h FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_powerpc_altivec.c Prefix zfs internal endian checks with _ZFS 2020-07-28 13:02:49 -07:00
vdev_raidz_math_scalar.c Rename fallthrough to zfs_fallthrough 2022-02-15 08:58:59 -08:00
vdev_raidz_math_sse2.c FreeBSD: fix the build with Clang 11 2020-08-17 15:40:17 -07:00
vdev_raidz_math_ssse3.c Refactor ccompile.h to not include system headers 2020-07-25 20:09:50 -07:00
vdev_raidz_math.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
vdev_raidz.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_rebuild.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
vdev_removal.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
vdev_root.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_trim.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
vdev.c Improve log spacemap load time 2022-04-26 10:44:21 -07:00
zap_leaf.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zap_micro.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zap.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zcp_get.c Correct compilation errors reported by GCC 10/11 2022-02-20 19:20:00 -08:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zcp.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
zfeature.c Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
zfs_byteswap.c module: mark arguments used 2022-02-18 09:34:03 -08:00
zfs_fm.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zfs_fuid.c Add const to nvlist functions to properly expose their real behavior 2021-12-06 18:19:13 -07:00
zfs_ioctl.c Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
zfs_log.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zfs_onexit.c file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_quota.c File incorrectly zeroed when receiving incremental stream that toggles -L 2020-06-09 10:41:01 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zfs_rlock.c Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zfs_vnops.c Prefer ATTR_ in shared codebase over AT_ 2022-04-05 13:02:17 -07:00
zil.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zio_checksum.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zio_compress.c module: zfs: fix unused, remove argsused 2021-12-23 09:42:47 -08:00
zio_inject.c module: zfs: zio_inject: zio_match_handler: don't << -1 2022-03-13 13:18:17 -07:00
zio.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
zle.c Add include files for prototypes 2020-06-18 12:21:25 -07:00
zrlock.c Remove dead code 2020-06-18 12:21:18 -07:00
zthr.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
zvol.c module: mark arguments used 2022-02-18 09:34:03 -08:00