[ovirt-users] gluster performance oVirt 3.4

[Tobias Honacker]

I've got the same issue using the same versions as Korsaks, using CentOS
6.5, too.
I could launch vms with gluster block backend driver using the standard
package of libvirt from centos repo.
but ovirt does not run the VM with the qemu GFAPI integration, the path of
the disk using the fuse mount.

<disk type='file' device='disk' snapshot='no'>
      <driver name='qemu' type='raw' cache='none' error_policy='stop'
io='threads'/>
      <source
file='/rhev/data-center/mnt/glusterSD/localhost:VMDATA/0add493f-0a7f-4b32-bcd5-ff25ca504b8b/images/68dbbc67-ea24-45a9-8727-4f85d100d1bb/8fe386f7-2aeb-43c2-bcb0-f76829c876b4'>
        <seclabel model='selinux' relabel='no'/>
      </source>
      <target dev='vda' bus='virtio'/>
      <serial></serial>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
    </disk>


or am i wrong?


On Mon, May 12, 2014 at 7:41 AM, Vadims Korsaks <truckk at inbox.lv> wrote:

> Underlying FS is XFS
> GlusterFS - glusterfs-3.5.0-2.el6
> I'm using CentOS, if this is problem could RHEL
> packages be used? why CentOS packages are compiled
> without native glusterfs support?
>
> Citējot Paul Robert Marino <prmarino1 at gmail.com> :
> >  What's the underlying filesystem for gluster is
> it XFS?
> >  What version of gluster are you using?
> >  What distro are you using and if its not RHEL
> or Fedora are you using a version of QEMU with
> gluster support compiled in keep in mind the
> versions with CentOS and Scientific Linux do not
> include Gluster native support compiled in.
> >
> >
> >
> >  -- Sent from my HP Pre3
> >
> >   On May 11, 2014 5:40, Vadims Korsaks
> <truckk at inbox.lv> wrote:
> >
> >  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?
> >
> >  _______________________________________________
> >  Users mailing list
> >  Users at ovirt.org
> >  http://lists.ovirt.org/mailman/listinfo/users
>
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