Re: OSDs get killed by OOM when other host goes down

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Hi Istvan,

> What can you do with osdmap in this case?

In modern versions of Ceph, IIRC as long as the number of "up" OSDs
equals the number of "in" OSDs, then the mon will trim osdmaps. (It's
possible the cluster also needs to be active+clean; I don't recall.)
In older versions (prior to a certain Nautilus build; I don't know
offhand which one), "up" had to equal the total number of OSDs for the
mons to trim osdmaps.

Josh
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