[ovirt-users] Recommended gluster setup

[Alex K]

In the replica 3 + 1 arbiter does this mean that if I loose the two nodes
having the normal volumes and left only with the node that has the arbiter
volume, I loose all data?

Thanx,
Alex

On Fri, Sep 15, 2017 at 11:25 AM, Kasturi Narra <knarra at redhat.com> wrote:

> 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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>>
>>
>
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