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authorRaghavendra Gowdappa <rgowdapp@redhat.com>2019-01-29 08:05:07 +0530
committerAmar Tumballi <amarts@redhat.com>2019-02-02 03:07:35 +0000
commita229ee1c8cdf8e0ac1abaeb60cabe6ab08f60546 (patch)
tree3d9938817e442c1ababb803ca54aef420bd849e4 /glusterfsd/src/glusterfsd.h
parent4674678951a1315975d66016fb55c49100b7819f (diff)
mount/fuse: expose auto-invalidation as a mount option
Auto invalidation is necessary when same (meta)data is shared/access across multiple mounts. However, if (meta)data is not shared, all relevant I/O goes through the cache of single mount and hence is coherent with (meta)data on bricks always. So, fuse-auto-invalidation can be disabled for this case which gives a huge performance boost for workloads that write data and then immediately read the data they just wrote. From glusterfs --help, <snip> --auto-invalidation[=BOOL] controls whether fuse-kernel can auto-invalidate attribute, dentry and page-cache. Disable this only if same files/directories are not accessed across two different mounts concurrently [default: "on"] </snip> Details on how disabling auto-invalidation helped to reduce pgbench init times can be found at [1]. Time taken for pgbench init of scale 8000 was 8340s. That will be an improvement of 86% (59280s vs 8340s) with auto-invalidations turned off along with other optimizations. Just disabling auto-invalidation contributed 56% improvement by reducing the total time taken by 33260s. [1] https://www.spinics.net/lists/gluster-devel/msg25907.html Change-Id: I0ed730dba9064bd9c576ad1800170a21e100e1ce Signed-off-by: Raghavendra Gowdappa <rgowdapp@redhat.com> updates: bz#1664934
Diffstat (limited to 'glusterfsd/src/glusterfsd.h')
-rw-r--r--glusterfsd/src/glusterfsd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/glusterfsd/src/glusterfsd.h b/glusterfsd/src/glusterfsd.h
index 86ac61c1a92..35cf6d88b7a 100644
--- a/glusterfsd/src/glusterfsd.h
+++ b/glusterfsd/src/glusterfsd.h
@@ -110,6 +110,7 @@ enum argp_option_keys {
ARGP_PRINT_LIBEXECDIR_KEY = 188,
ARGP_FUSE_FLUSH_HANDLE_INTERRUPT_KEY = 189,
ARGP_FUSE_LRU_LIMIT_KEY = 190,
+ ARGP_FUSE_AUTO_INVAL_KEY = 191,
};
struct _gfd_vol_top_priv {