Here's the basic concept behind what my answer would be if I wasn't short on time:
https://joejulian.name/blog/how-to-expand-glusterfs-replicated-clusters-by-one-server/


On 04/25/17 14:09, Gandalf Corvotempesta wrote:
Sorrt for the stupid subject and for questions that probably should be
pleaced in FAQ page, but,
let's assume a replica 3 cluster made with 3 servers (1 brick per server)

1) can I add a fourth server, with one brick, increasing the total
available space? If yes, how?

2) can I increase replica count from 3 to 4 ?

3) can I decrease replica count from 3 to 2 ?

4) can I move from a replicated volume to a distributed replicated volume ?
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