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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 /xlators/mount/fuse/utils/mount.glusterfs.in
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 'xlators/mount/fuse/utils/mount.glusterfs.in')
-rwxr-xr-xxlators/mount/fuse/utils/mount.glusterfs.in7
1 files changed, 7 insertions, 0 deletions
diff --git a/xlators/mount/fuse/utils/mount.glusterfs.in b/xlators/mount/fuse/utils/mount.glusterfs.in
index d09a7cd663e..868a57f7ede 100755
--- a/xlators/mount/fuse/utils/mount.glusterfs.in
+++ b/xlators/mount/fuse/utils/mount.glusterfs.in
@@ -229,6 +229,10 @@ start_glusterfs ()
cmd_line=$(echo "$cmd_line --reader-thread-count=$reader_thread_count");
fi
+ if [ -n "$auto-invalidation" ]; then
+ cmd_line=$(echo "$cmd_line --auto-invalidation=$fuse_auto_invalidation");
+ fi
+
if [ -n "$volume_name" ]; then
cmd_line=$(echo "$cmd_line --volume-name=$volume_name");
fi
@@ -529,6 +533,9 @@ with_options()
"reader-thread-count")
reader_thread_count=$value
;;
+ "auto-invalidation")
+ fuse_auto_invalidation=$value
+ ;;
"no-root-squash")
if [ $value = "yes" ] ||
[ $value = "on" ] ||