[Gluster-users] Question about the number of nodes

[Krutika Dhananjay]

On Tue, Apr 19, 2016 at 5:25 PM, Kevin Lemonnier <lemonnierk at ulrar.net>
wrote:

> Hi,
>
> As stated in another thread, we currently have a 3 nodes cluster with
> sharding enabled used for storing VM disks.
> I am migrating that to a new 3.7.11 cluster to hopefully fix the problems
> with had friday, but since those 3
> nodes are nearly full we'd like to expand.
>
> We have 3 nodes with a replica 3. What would be better, go to 5 nodes and
> use a replica 2 (so "wasting" one node),
> or go to 6 nodes with still a replica 3 ? Seems like having 3 replicas is
> better for safety, but can someone confirm
> that whats important for quorum is the number of bricks in a replica set,
> not the number of nodes total ?
> Would hate to get into a split brain because we upgraded to an even number
> of node.
>

You need to go for 3 more nodes with still a replica 3 to guard against
split-brains.

-Krutika


>
> Thanks,
>
> --
> Kevin Lemonnier
> PGP Fingerprint : 89A5 2283 04A0 E6E9 0111
>
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