From 06c4ba589102bf92c58cd9fba5c60064bc7a504e Mon Sep 17 00:00:00 2001 From: Vijay Bellur Date: Mon, 4 Feb 2013 10:17:01 +0530 Subject: 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 Reviewed-on: http://review.gluster.org/4460 Reviewed-by: Anand Avati Tested-by: Anand Avati --- extras/group-virt.example | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'extras') diff --git a/extras/group-virt.example b/extras/group-virt.example index 75a5ef314..7dc777f2d 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 -- cgit