tnx a lot!! now it's much better - from VM i can get dd with ~ 60 MB/s this is still ~ x2 lower than from host, but x3 better than it was before :) cool :) BTW could not found "GUI got ""Optimize for virt. store" option" in oVirt 3.5 Thanks Sahina for the inputs here. --Humble On Tue, May 13, 2014 at 7:27 PM, Vadims Korsaks <truckk(a)inbox.lv&gt; wrote: > Citējot Humble Devassy Chirammal > <humble.devassy(a)gmail.com&gt; : > > > | > > | Citējot Vijay Bellur <vbellur(a)redhat.com&gt; : > > | > On 05/11/2014 02:04 AM, Vadims Korsaks wrote: > > | > > HI! > > | > > > | > > Created 2 node setup with oVirt 3.4 and > > | CentOS 6.5, for storage created > > | > > 2 node replicated gluster (3.5) fs on same > > | hosts with oVirt. > > | > > mount looks like this: > > | > > 127.0.0.1:/gluster01 on > > | > > > | > /rhev/data-center/mnt/glusterSD/127.0.0.1:_gluster01 > > | type fuse.glusterfs > > | > > > | > (rw,default_permissions,allow_other,max_read=131072) > > | > > > | > > when i making gluster test with dd, > something > > | like > > | > > dd if=/dev/zero bs=1M count=20000 > > | > > > | > of=/rhev/data-center/mnt/glusterSD/127.0.0.1\:_gluster01/kaka > > | > > i'm gettting speed ~ 110 MB/s, so this is > > | 1Gbps speed of ethernet adapter > > | > > > | > > but with in VM created in oVirt speed is > > | lower than 20 MB/s > > | > > > | > > why there is so huge difference? > > | > > how can improve VMs disks speed? > > | > > > | > > | > What are your gluster volume settings? > Have you > > | applied the following > > | > performance tunables in gluster's virt > profile: > > | > > | > eager-lock=enable > > | > remote-dio=enable > > | > > | > Regards, > > | > Vijay > > | > > | setting were: > > | [root@centos155 ~]# gluster volume info gluster01 > > | > > | Volume Name: gluster01 > > | Type: Replicate > > | Volume ID: 436edaa3-ac8b-421f-aa35-68b5bd7064b6 > > | Status: Started > > | Number of Bricks: 1 x 2 = 2 > > | Transport-type: tcp > > | Bricks: > > | Brick1: 10.2.75.152:/mnt/gluster01/brick > > | Brick2: 10.2.75.155:/mnt/gluster01/brick > > | Options Reconfigured: > > | storage.owner-gid: 36 > > | storage.owner-uid: 36 > > | > > | > > | add your settings settings now it looks > > | > > | [root@centos155 ~]# gluster volume info gluster01 > > | > > | Volume Name: gluster01 > > | Type: Replicate > > | Volume ID: 436edaa3-ac8b-421f-aa35-68b5bd7064b6 > > | Status: Started > > | Number of Bricks: 1 x 2 = 2 > > | Transport-type: tcp > > | Bricks: > > | Brick1: 10.2.75.152:/mnt/gluster01/brick > > | Brick2: 10.2.75.155:/mnt/gluster01/brick > > | Options Reconfigured: > > | network.remote-dio: enable > > | cluster.eager-lock: enable > > | storage.owner-gid: 36 > > | storage.owner-uid: 36 > > | > > | > > | but this didn't affected performace in any > big way > > | should hosts to be restarted? > > | > > > glusterfs storage domain configuration GUI got > ""Optimize for virt. store" option which have to > be enabled when configuring for virt store. > > > Ref#http://www.ovirt.org/Features/GlusterFS_Storage_Domain > > > If the configuration is manual, you need to > set the group to 'virt' as shown below > > > #gluster volume set VOLNAME group virt > > > This will enable below options on gluster volume : > > > quick-read=off > > read-ahead=off > > io-cache=off > > stat-prefetch=off > > eager-lock=enable > > remote-dio=on > > > > Can you please make sure group has set properly ? > > > Also, invoke "dd" with oflag=direct option and > check whether it helps .. > > > > --Humble > tnx a lot!! now it's much better - from VM i can > get dd with ~ 60 MB/s > this is still ~ x2 lower than from host, but x3 > better than it was before :) > BTW could not found "GUI got ""Optimize for virt. > store" option" in oVirt 3.5