Re: Automation of single server addition to replica

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Il 09 nov 2016 1:23 AM, "Joe Julian" <joe@xxxxxxxxxxxxxxxx> ha scritto:
>
> Replicas are defined in the order bricks are listed in the volume create command. So gluster volume create myvol replica 2 server1:/data/brick1 server2:/data/brick1 server3:/data/brick1 server4:/data/brick1 will replicate between server1 and server2 and replicate between server3 and server4.
>
> See also https://joejulian.name/blog/how-to-expand-glusterfs-replicated-clusters-by-one-server/
>

i really hope this could be automated in newer gluster versions
There is almost no sense to make a replica on the same server so gluster
should automatically move bricks to preserve data consistency when adding servers.

Ceph does this by moving objects around and you don't have to add servers in a multiple of replica

the rebalance command could be used to rebalance newly added bricks by preserving replicas in a proper state

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