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ee191e802c
freebsd-nq/module/zfs
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Etienne Dechamps ee191e802c Make zil_slog_limit a tunable module parameter. 
zil_slog_limit specifies the maximum commit size to be written to the separate
log device. Larger commits bypass the separate log device and go directly to
the data devices.

The optimal value for zil_slog_limit directly depends on the latency and
throughput characteristics of both the separate log device and the data disks.
Small synchronous writes are faster on low-latency separate log devices (e.g.
SSDs) whereas large synchronous writes are faster on high-latency data disks
(e.g. spindles) because of higher throughput, especially with a large array.
The point is, the line between "small" and "large" synchronous writes in this
scenario is heavily dependent on the hardware used. That's why it should be
made configurable.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #783
2012-06-12 08:45:53 -07:00
..
arc.c Update ARC memory limits to account for SLUB internal fragmentation 2012-04-30 10:04:34 -07:00
bplist.c Fix gcc missing parenthesis warnings 2010-08-31 08:38:35 -07:00
bpobj.c Update to onnv_147 2010-08-26 14:24:34 -07:00
dbuf.c Illumos #764: panic in zfs:dbuf_sync_list 2011-08-01 12:09:11 -07:00
ddt_zap.c Fix stack ddt_zap_lookup() 2011-05-31 12:17:27 -07:00
ddt.c Fix stack ddt_class_contains() 2011-05-31 12:17:27 -07:00
dmu_diff.c Update to onnv_147 2010-08-26 14:24:34 -07:00
dmu_object.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
dmu_objset.c Export additional dsl symbols 2012-04-11 09:26:55 -07:00
dmu_send.c Illumos #755: dmu_recv_stream builds incomplete guid_to_ds_map 2011-10-18 11:18:14 -07:00
dmu_traverse.c Revert "Fix stack traverse_visitbp()" 2011-05-31 12:17:27 -07:00
dmu_tx.c Illumos #1475: zfs spill block hold can access invalid spill blkptr 2012-04-11 11:46:30 -07:00
dmu_zfetch.c Add missing ZFS tunables 2011-05-04 10:02:37 -07:00
dmu.c Add zfs_mdcomp_disable module option 2012-04-27 16:28:02 -07:00
dnode_sync.c Fix dbuf eviction assertion 2010-08-31 08:38:45 -07:00
dnode.c Improve meta data performance 2011-11-03 10:19:21 -07:00
dsl_dataset.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
dsl_deadlist.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
dsl_deleg.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
dsl_dir.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
dsl_pool.c Add 'dmu_tx' kstats entry 2012-02-27 08:59:10 -08:00
dsl_prop.c Export additional dsl symbols 2012-04-11 09:26:55 -07:00
dsl_scan.c Add missing ZFS tunables 2011-05-04 10:02:37 -07:00
dsl_synctask.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
fm.c Add missing ZFS tunables 2011-05-04 10:02:37 -07:00
gzip.c Fix zmod.h usage in userspace 2010-08-31 08:38:46 -07:00
lzjb.c Fix stack lzjb 2010-08-31 08:38:49 -07:00
Makefile.in Add .zfs control directory 2012-03-22 13:03:47 -07:00
metaslab.c Illumos #1909: disk sync write perf regression when slog is used post oi_148 2012-04-19 16:26:29 -07:00
refcount.c Fix gcc uninitialized variable warnings 2010-08-31 08:38:43 -07:00
rrwlock.c Enable rrwlock.c compilation 2010-12-07 16:05:25 -08:00
sa.c Add sa_spill_rele() interface 2012-03-07 16:28:00 -08:00
sha256.c Add linux sha2 support 2010-08-31 13:41:59 -07:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_config.c Prototype/structure update for Linux 2011-02-10 09:27:21 -08:00
spa_errlog.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_history.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_misc.c Cleanup ZFS debug infrastructure 2012-02-02 11:24:30 -08:00
spa.c Illumos #1951: leaking a vdev when removing an l2cache device 2012-04-11 11:32:06 -07:00
space_map.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
txg.c Add 'dmu_tx' kstats entry 2012-02-27 08:59:10 -08:00
uberblock.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
unique.c Fix gcc ident pragma warnings 2010-08-27 15:34:02 -07:00
vdev_cache.c Illumos #175: zfs vdev cache consumes excessive memory 2011-08-01 12:09:11 -07:00
vdev_disk.c Linux 2.6.37 compat, WRITE_FLUSH_FUA 2011-06-17 14:37:26 -07:00
vdev_file.c Illumos #1680: zfs vdev_file_io_start: validate vdev before using vdev_tsd 2012-04-11 11:23:18 -07:00
vdev_label.c Fix gcc uninitialized variable warnings 2010-08-31 08:38:43 -07:00
vdev_mirror.c Fix gcc c90 compliance warnings 2010-08-27 15:28:32 -07:00
vdev_missing.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
vdev_queue.c Add missing ZFS tunables 2011-05-04 10:02:37 -07:00
vdev_raidz.c Fix variables named current 2010-08-31 08:38:44 -07:00
vdev_root.c Fix gcc c90 compliance warnings 2010-08-27 15:28:32 -07:00
vdev.c Illumos #1951: leaking a vdev when removing an l2cache device 2012-04-11 11:32:06 -07:00
zap_leaf.c Fix gcc uninitialized variable warnings 2010-08-31 08:38:43 -07:00
zap_micro.c Export symbols for the full ZAP API 2011-09-27 16:12:36 -07:00
zap.c Fix rw_init() usage 2010-08-31 08:38:46 -07:00
zfs_acl.c Linux compat 2.6.39: mount_nodev() 2011-07-01 13:36:39 -07:00
zfs_byteswap.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_ctldir.c Account for .zfs ctldir inodes 2012-03-22 15:43:55 -07:00
zfs_debug.c Use spl_debug_* helpers 2012-02-09 16:37:48 -08:00
zfs_dir.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
zfs_fm.c Illumos #1951: leaking a vdev when removing an l2cache device 2012-04-11 11:32:06 -07:00
zfs_fuid.c Drop HAVE_XVATTR macros 2011-03-02 11:44:34 -08:00
zfs_ioctl.c Illumos #1346: zfs incremental receive may leave behind temporary clones 2012-04-11 12:02:27 -07:00
zfs_log.c Drop HAVE_XVATTR macros 2011-03-02 11:44:34 -08:00
zfs_onexit.c Add linux kernel device support 2010-08-31 13:41:50 -07:00
zfs_replay.c Use Linux ATTR_ versions 2011-03-03 11:29:15 -08:00
zfs_rlock.c Range lock performance improvements 2011-03-08 12:44:06 -08:00
zfs_sa.c Use SA_HDL_PRIVATE for SA xattrs 2012-03-02 13:20:48 -08:00
zfs_vfsops.c Linux 3.4 compat, d_make_root() replaces d_alloc_root() 2012-06-11 10:04:49 -07:00
zfs_vnops.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
zfs_znode.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
zil.c Make zil_slog_limit a tunable module parameter. 2012-06-12 08:45:53 -07:00
zio_checksum.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zio_compress.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zio_inject.c Add missing ZFS tunables 2011-05-04 10:02:37 -07:00
zio.c Illumos #1909: disk sync write perf regression when slog is used post oi_148 2012-04-19 16:26:29 -07:00
zle.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zpl_ctldir.c Linux 3.3 compat, iops->create()/mkdir()/mknod() 2012-04-30 12:52:38 -07:00
zpl_export.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
zpl_file.c Support the fallocate() file operation. 2012-02-09 16:19:32 -08:00
zpl_inode.c Linux 3.3 compat, iops->create()/mkdir()/mknod() 2012-04-30 12:52:38 -07:00
zpl_super.c Add .zfs control directory 2012-03-22 13:03:47 -07:00
zpl_xattr.c Add missing NULL in zpl_xattr_handlers 2012-03-15 15:18:29 -07:00
zrlock.c Export ZFS symbols needed by Lustre. 2010-09-17 16:24:15 -07:00
zvol.c Honor logbias when writing to ZVOLs. 2012-06-11 09:43:48 -07:00