Re: Behaviour of a cluster with full OSD(s)

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Max, List,

Max Power [Tue, Dec 23, 2014 at 12:34:54PM +0100]:
> [...Recovering from full osd ...] 
> 
> Normally
> the osd process quits then and I cannot restart it (even after setting the
> replicas back). The only possibility is to manually delete complete PG folders
> after exploring them with 'pg dump'. Is this the only way to get it back working
> again?

I was wondering if ceph-osd crashing when the disk gets full shouldn't
be considered being a bug?

Shouldn't ceph osd be able to recover itself? Like if an admin detects
that the disk is full, she can simply reduce the weight of the osd to
free up space. With a dead osd, this is not possible.

To those having deeper ceph knowledge: 

For what reason does ceph-osd exit when the disk is full?
Why can it not start when it is full to get itself out of this 
invidious situation?

Cheers,

Nico

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