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From d45c64e17e1eb8003ac1086cbd3abea32414c7f9 Mon Sep 17 00:00:00 2001
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From: Raghavendra Gowdappa <rgowdapp@redhat.com>
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Date: Tue, 12 Feb 2019 18:33:44 +0530
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Subject: [PATCH 345/346] read-ahead/io-cache: turn off by default
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We've found perf xlators io-cache and read-ahead not adding any
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performance improvement. At best read-ahead is redundant due to kernel
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read-ahead and at worst io-cache is degrading the performance for
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workloads that doesn't involve re-read. Given that VFS already have
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both these functionalities, this patch makes these two
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translators turned off by default for native fuse mounts.
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For non-native fuse mounts like gfapi (NFS-ganesha/samba) we can have
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these xlators on by having custom profiles.
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>Change-Id: Ie7535788909d4c741844473696f001274dc0bb60
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>Signed-off-by: Raghavendra Gowdappa <rgowdapp@redhat.com>
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>fixes: bz#1676479
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Upstream fix link: https://review.gluster.org/#/c/glusterfs/+/22203/
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BUG: 1788656
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Change-Id: Ie7535788909d4c741844473696f001274dc0bb60
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Signed-off-by: Sunil Kumar Acharya <sheggodu@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/188967
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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---
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tests/basic/ec/self-heal.t | 2 ++
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tests/basic/glusterd/volfile_server_switch.t | 2 +-
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xlators/mgmt/glusterd/src/glusterd-volume-set.c | 4 ++--
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3 files changed, 5 insertions(+), 3 deletions(-)
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diff --git a/tests/basic/ec/self-heal.t b/tests/basic/ec/self-heal.t
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index d217559..6329bb6 100644
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--- a/tests/basic/ec/self-heal.t
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+++ b/tests/basic/ec/self-heal.t
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@@ -131,6 +131,8 @@ TEST $CLI volume create $V0 redundancy 2 $H0:$B0/${V0}{0..5}
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TEST $CLI volume set $V0 client-log-level DEBUG
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#Write-behind has a bug where lookup can race over write which leads to size mismatch on the mount after a 'cp'
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TEST $CLI volume set $V0 performance.write-behind off
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+#md-cache can return stale stat due to default timeout being 1 sec
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+TEST $CLI volume set $V0 performance.stat-prefetch off
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EXPECT "Created" volinfo_field $V0 'Status'
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TEST $CLI volume start $V0
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EXPECT_WITHIN $PROCESS_UP_TIMEOUT "Started" volinfo_field $V0 'Status'
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diff --git a/tests/basic/glusterd/volfile_server_switch.t b/tests/basic/glusterd/volfile_server_switch.t
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index 3090609..e11cfed 100644
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--- a/tests/basic/glusterd/volfile_server_switch.t
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+++ b/tests/basic/glusterd/volfile_server_switch.t
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@@ -34,7 +34,7 @@ TEST glusterfs --volfile-id=/$V0 --volfile-server=$H1 --volfile-server=$H2 --vol
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TEST kill_glusterd 1
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-TEST $CLI_2 volume set $V0 performance.io-cache off
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+TEST $CLI_2 volume set $V0 performance.write-behind off
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# make sure by this time directory will be created
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# TODO: suggest ideal time to wait
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diff --git a/xlators/mgmt/glusterd/src/glusterd-volume-set.c b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
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index 16601a2..9001b88 100644
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--- a/xlators/mgmt/glusterd/src/glusterd-volume-set.c
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+++ b/xlators/mgmt/glusterd/src/glusterd-volume-set.c
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@@ -2235,7 +2235,7 @@ struct volopt_map_entry glusterd_volopt_map[] = {
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{.key = "performance.read-ahead",
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.voltype = "performance/read-ahead",
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.option = "!perf",
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- .value = "on",
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+ .value = "off",
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.op_version = 1,
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.description = "enable/disable read-ahead translator in the volume.",
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.flags = VOLOPT_FLAG_CLIENT_OPT | VOLOPT_FLAG_XLATOR_OPT},
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@@ -2249,7 +2249,7 @@ struct volopt_map_entry glusterd_volopt_map[] = {
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{.key = "performance.io-cache",
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.voltype = "performance/io-cache",
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.option = "!perf",
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- .value = "on",
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+ .value = "off",
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.op_version = 1,
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.description = "enable/disable io-cache translator in the volume.",
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.flags = VOLOPT_FLAG_CLIENT_OPT},
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--
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1.8.3.1
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