[Gluster-users] Convert replica 2 to replica 3 arbiter 1

[Atin Mukherjee]

-Atin
Sent from one plus one
On 29-Mar-2016 10:21 pm, "Russell Purinton" <russell.purinton at gmail.com>
wrote:
>
> I have several existing volumes configured in the following way:
>
> Volume Name: sonic001
> Type: Distributed-Replicate
> Volume ID: 362eb3a8-c211-4f35-bcd3-87785c51f15c
> Status: Started
> Number of Bricks: 4 x 2 = 8
> Transport-type: tcp
> Bricks:
> Brick1: xs141:/brick1/sonic001p0r0
> Brick2: xs138:/brick1/sonic001p0r1
> Brick3: xs139:/brick1/sonic001p1r0
> Brick4: xs140:/brick1/sonic001p1r1
> Brick5: xs141:/brick0/sonic001p2r0
> Brick6: xs138:/brick0/sonic001p2r1
> Brick7: xs139:/brick0/sonic001p4r0
> Brick8: xs140:/brick0/sonic001p3r1
>
> I recently learned that replica 2 can’t be considered HA because of the
split brain scenario that would occur if a network partition occurred.   I
also recently learned that using replica 3 arbiter 1 was a way to solve
this problem without consuming additional space.
>
> Is there a way I can change this existing volume to be replica 3 arbiter
1, or do I need to create new volumes and rsync the data?

I think you should be able to convert the volume topology using add-brick
command.

>
> Thanks,
>
> Russ
>
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-Atin
Sent from one plus one
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