We've runned a 50TB Cluster with 3 MON services on the same nodes with OSDs. We are planning to upgrade to 200TB, I have 2 questions: 1. Should we separate MON services to dedicated hosts?
If you think about stability, simplicity and redundancy - yes.
2. From your experiences, how size of cluster we shoud consider to put MON on dedicated hosts?
From scratch. Read this from Wido [1]
[1] http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-February/024440.html
k
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