Il 2020-09-09 15:30 Miguel Mascarenhas Filipe ha scritto:
I'm setting up GlusterFS on 2 hw w/ same configuration, 8 hdds. This deployment will grow later on.
Hi, I really suggest avoiding a replica 2 cluster unless it is for testing only. Be sure to add an arbiter at least (using a replica 2 arbiter 1 cluster).
I'm undecided between these different configurations and am seeing comments or advice from more experienced users of GlusterFS. Here is the summary of 3 options: 1. 1 brick per host, Gluster "distributed" volumes, internal redundancy at brick level
I strongly suggest against it: any server reboot will cause troubles for mounted clients. I will end with *lower* uptime than a single server.
2. 1 brick per drive, Gluster "distributed replicated" volumes, no internal redundancy
This would increase Gluster performance via multiple bricks; however a single failed disk will put the entire note out-of-service. Moreover, Gluster heals are much slower processes than a simple RAID1/ZFS mirror recover.
3. 1 brick per host, Gluster "distributed replicated" volumes, no internal redundancy
Again, a suggest against it: a single failed disk will put the entire note out-of-service *and* will cause massive heal as all data need to be copied from the surviving node, which is a long and stressful event for the other node (and for the sysadmin).
In short, I would not use Gluster without *both* internal and brick-level redundancy. For a simple setup, I suggest option #1 but in replica setup (rather than distributed). You can increase the number of briks (mountpoint) via multiple zfs datasets, if needed.
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