[Gluster-users] Adding bricks to an existing installation.

[Karthik Subrahmanya]

Hey Ludwig,

Yes this configuration is fine. You can add them and do the rebalance after
that.

FYI: Replica 2 volumes are prone to split-brains. Replica 3 or arbiter will
highly reduce the possibility of ending up in split-brains.
If possible consider using one of those configurations. For more
information go through [1].

[1] https://gluster.readthedocs.io/en/latest/Administrator%
20Guide/Split%20brain%20and%20ways%20to%20deal%20with%20it/

Thanks & Regards,
Karthik

On Tue, Sep 26, 2017 at 12:48 AM, Ludwig Gamache <ludwig at elementai.com>
wrote:

> Sharding is not enabled.
>
> Ludwig
>
> On Mon, Sep 25, 2017 at 2:34 PM, <lemonnierk at ulrar.net> wrote:
>
>> Do you have sharding enabled ? If yes, don't do it.
>> If no I'll let someone who knows better answer you :)
>>
>> On Mon, Sep 25, 2017 at 02:27:13PM -0400, Ludwig Gamache wrote:
>> > All,
>> >
>> > We currently have a Gluster installation which is made of 2 servers.
>> Each
>> > server has 10 drives on ZFS. And I have a gluster mirror between these
>> 2.
>> >
>> > The current config looks like:
>> > SERVER A-BRICK 1 replicated to SERVER B-BRICK 1
>> >
>> > I now need to add more space and a third server. Before I do the
>> changes, I
>> > want to know if this is a supported config. By adding a third server, I
>> > simply want to distribute the load. I don't want to add extra
>> redundancy.
>> >
>> > In the end, I want to have the following done:
>> > Add a peer to the cluster
>> > Add 2 bricks to the cluster (one on server A and one on SERVER C) to the
>> > existing volume
>> > Add 2 bricks to the cluster (one on server B and one on SERVER C) to the
>> > existing volume
>> > After that, I need to rebalance all the data between the bricks...
>> >
>> > Is this config supported? Is there something I should be careful before
>> I
>> > do this? SHould I do a rebalancing before I add the 3 set of disks?
>> >
>> > Regards,
>> >
>> >
>> > Ludwig
>>
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > http://lists.gluster.org/mailman/listinfo/gluster-users
>>
>>
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>
>
>
> --
> Ludwig Gamache
> IT Director - Element AI
> 4200 St-Laurent, suite 1200
> 514-704-0564
>
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