diff options
| author | Vijay Bellur <vbellur@redhat.com> | 2013-02-04 10:17:01 +0530 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-02-04 17:42:05 -0800 |
| commit | 06c4ba589102bf92c58cd9fba5c60064bc7a504e (patch) | |
| tree | a16139de3082dd006fa0bdc7134848ba052c724b /extras | |
| parent | 1c430d2747f2c0960dcdcd9da4b253c89674bdd7 (diff) | |
group-virt: Change profile to include remote-dio and exclude posix-aio.
remote-dio enables filtering O_DIRECT in the client xlator. This has been
found to be useful for improving performance when there are multiple VMs
talking to an image store.
Aggregated throughput results for a single thread iozone run from multiple VMs
and a single host can be seen below:
-------------------------------------------------
No. of VMs | remote-dio on | remote-dio off |
-------------------------------------------------
2 | 400 MB/s | 202 MB/s |
4 | 650 MB/s | 410 MB/s |
--------------------------------------------------
posix-aio has not been found to improve performance consistently with VM image
workload. Hence not including that in the default virt profile.
Change-Id: I592f68b95a955036f1a985352d2f4950ced1deef
BUG: 907301
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/4460
Reviewed-by: Anand Avati <avati@redhat.com>
Tested-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/group-virt.example | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/extras/group-virt.example b/extras/group-virt.example index 75a5ef31426..7dc777f2db9 100644 --- a/extras/group-virt.example +++ b/extras/group-virt.example @@ -2,5 +2,5 @@ quick-read=off read-ahead=off io-cache=off stat-prefetch=off -linux-aio=enable eager-lock=enable +remote-dio=enable |