[ovirt-users] Recommended gluster setup

[Kasturi Narra]

Hi ,

   yes, you are right. Since arbiter brick  has only metadata and  data for
the vm has to be served from one of the other two replicas, read is slow.

    Arbiter is a special subset of replica 3 volumes and is aimed at
preventing split-brains and providing same consistency as a normal replica
3 volume with out consuming 3x space. You could use replica 3 and no issues
with that.

Thanks
kasturi

On Fri, Sep 15, 2017 at 12:41 PM, Abi Askushi <rightkicktech at gmail.com>
wrote:

> Hi all,
>
> I see in the ovirt guides that a gluster volume replica 3 with 1 arbiter
> is recommended.
> Why not simple replica 3? Is it due to the higher replication data that
> would cause performance issues?
>
> What I am observing is that a VM running on the server which has the
> arbiter brick has slower read performance then when the same VM runs on
> another server with a normal brick. Has anyone observed this? Is it because
> the arbiter does not have the real data on it?
>
> Thanx,
> Alex
>
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