Hi, Given a cluster with multiple racks or rooms where the rack or room is the failure domain for replicated pools. Given one or more CephFS volumes (filesystems) with at least one active MDS each and a standby-replay for each active MDS. Each room or rack contains multiple MDS daemons (one per host). Is there a possibility to guarantee that the standby-replay MDS for each active MDS does not run in the same failure domain (rack or room)? Because when both run in the same failure domain and that domain fails there is no point in having a standby-replay. Are there any ideas on how to solve this? Regards -- Robert Sander Linux Consultant Heinlein Consulting GmbH Schwedter Str. 8/9b, 10119 Berlin https://www.heinlein-support.de Tel: +49 30 405051 - 0 Fax: +49 30 405051 - 19 Amtsgericht Berlin-Charlottenburg - HRB 220009 B Geschäftsführer: Peer Heinlein - Sitz: Berlin