Re: For 750 osd 5 monitor in redhat doc

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Hi,

On 9/18/24 10:00, Szabo, Istvan (Agoda) wrote:

We will reach this number so wonder do we really need 5 mon?
Currently we have 3 collocated  mgr/mon on baremetal server with some multiste gw traffic, if needed I'd plan to simply add some mon on vm only.

The current recommended number of MONs is 5.
A new cluster deployed with cephadm wants to start 5 MONs.

When you have 3 MONs and 1 is down there is no room for any failure any more. A second MON going down takes your cluster offline.

With 5 MONs you can lose 2 and the remaining 3 MONs still have quorum.

Regards
--
Robert Sander
Heinlein Consulting GmbH
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