path: root/geo-replication/syncdaemon/
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authorBrian Foster <>2013-07-02 10:47:00 -0400
committerAnand Avati <>2013-09-04 09:04:15 -0700
commit3b23f9acae02e6be192c00fc410a4d15974f5343 (patch)
tree69d35296fabbc1438375507cfe610d08cae5c6dd /geo-replication/syncdaemon/
parent98df12f040d95d6a26047f03988b120984f7439e (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 <> Reviewed-on: Tested-by: Gluster Build System <> Reviewed-by: Anand Avati <>
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