Hi, I don't have an explanation yet but some more information about your cluster would be useful like 'ceph osd tree', 'ceph osd df', 'ceph status' etc. Thanks, Eugen Zitat von Stefan Pinter <stefan.pinter@bearingpoint.com>:

Hi! 😊

It would be very kind of you to help us with that!

We have pools in our ceph cluster that are set to replicated size 2 min_size 1. Obviously we want to go to size 3 / min_size 2 but we experience problems with that.

USED goes to 100% instantly and MAX AVAIL goes to 0. Write operations seemed to stop.

POOLS: NAME ID USED %USED MAX AVAIL OBJECTS Pool1 24 35791G 35.04 66339G 8927762 Pool2 25 11610G 14.89 66339G 3004740 Pool3 26 17557G 100.00 0 2666972

Before the change it was like this:

NAME ID USED %USED MAX AVAIL OBJECTS Pool1 24 35791G 35.04 66339G 8927762 Pool2 25 11610G 14.89 66339G 3004740 Pool3 26 17558G 20.93 66339G 2667013

This was quite surprising to us as we’d expect USED to go to something like 30%. Going back to 2/1 also gave us back the 20.93% usage instantly.

What’s the matter here?

Thank you and best regards Stefan ________________________________ BearingPoint GmbH Sitz: Wien Firmenbuchgericht: Handelsgericht Wien Firmenbuchnummer: FN 175524z

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