Hi Adam,
The arbiter holds only metadata for gluster to be able to resolve any potential split
brains. It can run on another host (not in the 2 replicas) and the only requirements
are:
1. Low network lattency - you don't want to put it in Chona, unless your replica
servers are also there :)
With remote arbiter - the lattency will affect you only when 1 of the replicas is down.
2. Fast storage that can easily create the files' inodes. I would preffer a SSD , but
even high speed rotational disks are OK
In other words, you should create gluster bricks like this one:
server1:/gluster_bricks/myvolume/brick1
server2:/gluster_bricks/myvolume/brick1
arbiter:/gluster_bricks/myvolume/arbiter_brick
In this case, if a node dies - the other node + arbiter will have quorum and will serve
any I/O for oVirt.
The arbiter_brick does not require much space, as only metadata will be written.
Actually with hyperconverged setup you have 2 clusters on the same nodes - storage
(gluster) & oVirt (virtualization).
Best Regards,
Strahil NikolovOn Jun 17, 2019 15:06, adam.fasnacht(a)gmail.com wrote:
Hello Strahil,
Thank you for getting back to me. The arbitier machine is similar to a hyper-v Quoroum,
is that correct? I come from a Hyper-V world, and am getting familiar with the
terminology here. If that is true, can he arbitier be a VM hosted on another separate
host? In other words, I have 2 hosts that I would use for ovirt. I have another host
that is only used as a backup device. Could a VM on the backup host be used as an
arbitier for the cluster?
Adam
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