[Gluster-devel] [Gluster-users] About Gluster cluster availability when one of out of two nodes is down

[Atin Mukherjee]

On Thu, Jun 30, 2016 at 11:57 AM, Ravishankar N <ravishankar at redhat.com>
wrote:

> On 06/30/2016 11:40 AM, Atin Mukherjee wrote:
>
> Currently on a two node set up, if node B goes down and node A is rebooted
> brick process(es) on node A doesn't come up to avoid split brains.
>
>
> This has always been the case. A patch I had sent quite some time back (
> http://review.gluster.org/#/c/8034/) was eventually abandoned, I think
> `volume start force` should suffice instead of adding checks in code.
>

This is exactly what I thought earlier as a workaround. The problem with
this approach here is the manual intervention which users may not like to
apply. I got to know from Joe Julian that this is a departure from prior
behaviour and I got a feedback that we should think about having a solution
where there is no manual intervention/workaround required.


-Ravi
>
> However we have had concerns/bugs from different gluster users on the
> availability with this configuration. So we can solve this issue by
> starting the brick process(es) if quorum is not enabled. If quorum is
> enabled we'd not. Although quorum option really doesn't make sense in a two
> node cluster, but we can leverage this option to get rid of this specific
> situation.
>
> I'd like to know your feedback on this and then I push a patch right away.
>
> ~Atin
>
>
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>
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