From 3b23f9acae02e6be192c00fc410a4d15974f5343 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Tue, 2 Jul 2013 10:47:00 -0400 Subject: 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 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: http://review.gluster.org/4519 Tested-by: Gluster Build System Reviewed-by: Anand Avati --- .../readdir-ahead/src/readdir-ahead-mem-types.h | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 xlators/performance/readdir-ahead/src/readdir-ahead-mem-types.h (limited to 'xlators/performance/readdir-ahead/src/readdir-ahead-mem-types.h') diff --git a/xlators/performance/readdir-ahead/src/readdir-ahead-mem-types.h b/xlators/performance/readdir-ahead/src/readdir-ahead-mem-types.h new file mode 100644 index 00000000..39e2c536 --- /dev/null +++ b/xlators/performance/readdir-ahead/src/readdir-ahead-mem-types.h @@ -0,0 +1,24 @@ +/* + Copyright (c) 2008-2013 Red Hat, Inc. + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + + +#ifndef __RDA_MEM_TYPES_H__ +#define __RDA_MEM_TYPES_H__ + +#include "mem-types.h" + +enum gf_rda_mem_types_ { + gf_rda_mt_rda_local = gf_common_mt_end + 1, + gf_rda_mt_rda_fd_ctx, + gf_rda_mt_rda_priv, + gf_rda_mt_end +}; + +#endif -- cgit