2016-06-09 10:28 GMT+02:00 Christian Balzer <chibi@xxxxxxx>: > Define "small" cluster. Max 14 OSD nodes with 12 disks each, replica 3. > Your smallest failure domain both in Ceph (CRUSH rules) and for > calculating how much over-provisioning you need should always be the > node/host. > This is the default CRUSH rule for a reason. So, the default failure domain is enough > Of course if you have 2 switches per rack, dual links and dual power > supplies feed by independent PDUs on all your gear, a "rack" failure > domain becomes pretty cosmetic and superfluous. All of our servers and rack are dual PDUs (with different power feeds) and dual switches. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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