Hi Bryan, We have 1G nics on all our servers. Do you think that changing our design to distribute-replicate will improve the performance? Anything in the gluster performance settings that you think I should change? thanks! On Tue, Apr 9, 2013 at 6:00 AM, Bryan Whitehead <driver at megahappy.net>wrote: > This looks like you are replicating every file to all bricks? > > What is tcp running on? 1G nics? 10G? IPoIB (40-80G)? > > I think you want to have Distribute-Replicate. So 4 bricks with replica = > 2. > > Unless you are running at least 10G nics you are going to have serious > IO issues in your KVM/qcow2 VM's. > > On Mon, Apr 8, 2013 at 7:11 AM, Eyal Marantenboim > <eyal at theserverteam.com> wrote: > > Hi, > > > > > > We have a set of 4 gluster nodes, all in replicated (design?) > > > > We use it to store our qcow2 images for kvm. These images have a variable > > IO, though most of them are for reading only. > > > > > > I tried to find some documentation re. performance optimization, but it's > > either unclear to me, or I couldn't find much.. so I'd copied from the > > internet and tried to adjust the config to our needs, but I'm sure it's > not > > optimized. > > > > > > We're using 3.3.1 on top of XFS. > > > > The qcow images are about 30GB (a couple of 100GB). > > > > > > Can someone please tell what would be the best paramenter for > performance to > > look at? > > > > > > here is volume info: > > > > > > Volume Name: images > > > > Type: Replicate > > > > Volume ID: > > > > Status: Started > > > > Number of Bricks: 1 x 4 = 4 > > > > Transport-type: tcp > > > > Bricks: > > > > Brick1: vmhost2:/exports/1 > > > > Brick2: vmhost3:/exports/1 > > > > Brick3: vmhost5:/exports/1 > > > > Brick4: vmhost6:/exports/1 > > > > Options Reconfigured: > > > > performance.cache-max-file-size: 1GB > > > > nfs.disable: on > > > > performance.cache-size: 4GB > > > > performance.cache-refresh-timeout: 1 > > > > performance.write-behind-window-size: 2MB > > > > performance.read-ahead: on > > > > performance.write-behind: on > > > > performance.io-cache: on > > > > performance.stat-prefetch: on > > > > performance.quick-read: on > > > > performance.io-thread-count: 64 > > > > performance.flush-behind: on > > > > features.quota-timeout: 1800 > > > > features.quota: off > > > > > > Thanks in advanced. > > > > > > _______________________________________________ > > Gluster-users mailing list > > Gluster-users at gluster.org > > http://supercolony.gluster.org/mailman/listinfo/gluster-users > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20130409/b8cefd8a/attachment.html>
