Re: Is Ceph recovery able to handle massive crash

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On Saturday, January 5, 2013 at 4:19 AM, Denis Fondras wrote:
> Hello all,
> 
> I'm using Ceph 0.55.1 on a Debian Wheezy (1 mon, 1 mds et 3 osd over 
> btrfs) and every once in a while, an OSD process crashes (almost never 
> the same osd crashes).
> This time I had 2 osd crash in a row and so I only had one replicate. I 
> could bring the 2 crashed osd up and it started to recover. 
> Unfortunately, the "source" osd crashed while recovering and now I have 
> a some lost PGs.
> 
> If I happen to bring the primary OSD up again, can I imagine the lost PG 
> will be recovered too ?


Yes, it will recover just fine. Ceph is strictly consistent and so you won't lose any data unless you lose the disks.
-Greg

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