Re: [ovirt-users] gluster performance oVirt 3.4

Citējot Sahina Bose <sabose(a)redhat.com&gt; : > > On 05/13/2014 07:27 PM, Vadims Korsaks 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 > > > The option "Optimize for Virt store" is available when you select a > volume in Ovirt - both as a right click menu option as well as a button > in the top sub navigation bar. > > You also can check this option while creating a gluster volume using the > oVirt GUI > > i have glusterfs as my master storage, but there is nothing in volumes, empty. And i can't create gluster volume, there is no choise in Data Center and Volume Cluster.