[ovirt-users] gluster performance oVirt 3.4

[Humble Devassy Chirammal]

>
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 at inbox.lv> wrote:

> Citējot Humble Devassy Chirammal
> <humble.devassy at gmail.com> :
> >
> >  |
> >  | Citējot Vijay Bellur <vbellur at 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 at 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 at 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
>
>
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