[Gluster-users] Advice needed for geo replication

Felipe Arturo Polanco
Thu, 04 May 2017 13:19:35 -0000

Hi,

I would like some advice on setting up a replicated or geo replicated setup
in Gluster.

Right now the setup consists of 1 storage server with no replica serving
gluster volumes to clients.

We need to have some sort of replication of it by adding a second server
but the catch is this second server will have spinning disks while the
current one has SSD disks.

I have read that in Gluster, the clients are the one running the
replication of data by sending the same bytes to the gluster servers, so by
using one gluster server with spinning disks the performance of clients
will be as fast as a spinning disk speed even when the other server has SSD.
For budget reasons we can't have SSDs in second storage server.

I kept reading and found the geo replication feature which makes the server
do the replication of data instead of the clients, which is more likely my
case but looks like there is no automatic failover mechanism of it and the
administrator need to intervene to make the slave server a master one
according to this document:
https://access.redhat.com/documentation/en-US/Red_Hat_Storage/2.0/html/Administration_Guide/ch11s05.html

Given this scenario, I really need a piece of advice from the gluster users
on how would be the best approach to have a replicated setup with SSD+HDD
storage servers.

Thanks,
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