The more servers you have in your cluster, the less impact a failure causes to the cluster. Monitor your systems and keep them up to date. You can also isolate data with clever crush rules and creating multiple zones.
Mike Kuriger From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Marc Boisis Sent: Monday, May 14, 2018 9:50 AM To: ceph-users Subject: [ceph-users] a big cluster or several small 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 ? Do you have experience feedback on multiple clusters in production on the same hardware: - containers (LXD or Docker) - multiple cluster on the same host without virtualization (with ceph-deploy ... --cluster ...) - multilple pools ... Do you have any advice?
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