Well I currently manage 27 nodes, over 9 clusters There is some burden that you should considers The easiest is : "what do we do when two smalls clusters, which grows slowly, need more space" With one cluster: buy a node, add it, done With two clusters: buy two nodes, add them, done This can be an issue; If you can move the data between clusters transparently and painlessly, then it's OK : most of our data is used via Proxmox clusters, which allow us to move from one Ceph cluster to an other, so we can "rebalance" the whole stuff However, we also have some Cephfs stuff, and this is not the same deal: moving part of a cephfs between clusters in a pita (youhou, rsync & friends) Considering all of this, splitting your cluster may be a sane idea, or may be not, I however recommend against over-splitting : it does not worth it On 05/14/2018 06:49 PM, Marc Boisis wrote: > > Hi, > > Hello, > Currently we have a 294 OSD (21 hosts/3 racks) cluster with RBD clients only, 1 single pool (size=3). > > We want to divide this cluster into several to minimize the risk in case of failure/crash. > For example, a cluster for the mail, another for the file servers, a test cluster ... > Do you think it's a good idea ? > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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