Citējot Humble Devassy Chirammal <humble.deva...@gmail.com> : > > | > | Citējot Vijay Bellur <vbel...@redhat.com> : > | > 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 _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users