diff options
| author | Brian Foster <bfoster@redhat.com> | 2013-07-02 10:47:00 -0400 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-09-04 09:04:15 -0700 |
| commit | 3b23f9acae02e6be192c00fc410a4d15974f5343 (patch) | |
| tree | 69d35296fabbc1438375507cfe610d08cae5c6dd /xlators/mgmt/glusterd/src/glusterd-volume-set.c | |
| parent | 98df12f040d95d6a26047f03988b120984f7439e (diff) | |
performance/readdir-ahead: introduce directory read-ahead translator
This is a translator to improve the performance of typical,
sequential directory reads (i.e., ls). readdir-ahead begins
preloading the contents of a directory on open and serves readdir
requests from the preloaded content. readdir-ahead is currently
implemented to only handle the single threaded directory read
case.
readdir-ahead is currently disabled by default. It can be enabled
with the following command:
gluster volume set <volname> readdir-ahead on
The following are results of a getdents test on a single brick
volume.
Test info:
- Single VM, gluster client/server.
- Volume mounted with native client using --gid-timeout=2.
- getdents on single directory with 100k 0-byte files.
Test results:
- !readdir-ahead
read 3120080 bytes from offset 0
3 MiB, 4348 ops, 0:00:07.00 (416.590 KiB/sec and 594.4737 ops/sec)
- readdir-ahead
read 3120080 bytes from offset 0
3 MiB, 4348 ops, 0:00:03.00 (820.116 KiB/sec and 1170.3043 ops/sec)
BUG: 980517
Change-Id: Ieceb9e1eb47d1d5b5af8da2bf03839537364653f
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.org/4519
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-volume-set.c')
| -rw-r--r-- | xlators/mgmt/glusterd/src/glusterd-volume-set.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-volume-set.c b/xlators/mgmt/glusterd/src/glusterd-volume-set.c index 738cacd5683..7ec8cf75541 100644 --- a/xlators/mgmt/glusterd/src/glusterd-volume-set.c +++ b/xlators/mgmt/glusterd/src/glusterd-volume-set.c @@ -845,6 +845,15 @@ struct volopt_map_entry glusterd_volopt_map[] = { .description = "enable/disable read-ahead translator in the volume.", .flags = OPT_FLAG_CLIENT_OPT | OPT_FLAG_XLATOR_OPT }, + { .key = "performance.readdir-ahead", + .voltype = "performance/readdir-ahead", + .option = "!perf", + .value = "off", + .op_version = 3, + .description = "enable/disable readdir-ahead translator in the volume.", + .flags = OPT_FLAG_CLIENT_OPT | OPT_FLAG_XLATOR_OPT + }, + { .key = "performance.io-cache", .voltype = "performance/io-cache", .option = "!perf", |