[Gluster-users] 2 Replicas on 3 servers

[Chris Clarke]

Hi,

I've seen the other post recently on 3 servers and 2 replicas, but it
doesn't answer the essential point of whether you can have a replica of 2
with 3 servers if those servers have 1 brick on each server.

I'm looking to replicate the behaviour of an IBM GPFS filesystem, where I
have a 3 node cluster with a replication factor of 2.  As GPFS is block
based, then each block of data is stored on two of the 3 servers, i.e.
block 1 may be on server 1 and 3, block 2 may be on server 1 and 2, block 3
may be on 2 and 3...

Is it possible to do a similar thing with Gluster?  I'd also love it to be
possible to extend the filesystem by adding extra servers and being able to
rebalance the file's distribution across them, but keeping the replication
factor of 2, so I can always stand the loss of a single node without data
loss.

Is any of this achievable?

Thanks

Chris

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