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> wrote:
> Citējot Humble Devassy Chirammal
> <humble.devassy(a)gmail.com> :
>
> > |
> > | Citējot Vijay Bellur <vbellur(a)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
