You can look at which OSDs the PGs map to. If the PGs have
insufficient replica counts they'll report as degraded in "ceph -s" or
"ceph -w".
Software Engineer #42 @ http://inktank.com | http://ceph.com


On Mon, Jul 7, 2014 at 4:30 PM, James Harper <ja...@ejbdigital.com.au> wrote:
>>
>> It sounds like maybe you've got a bad CRUSH map if you're seeing that.
>> One of the things the tunables do is make the algorithm handle a
>> variety of maps better, but if PGs are only mapping to one OSD you
>> need to fix that.
>>
>
> How can I tell that this is definitely the case (all copies of a pg on a 
> single osd or a single node)?
>
> Thanks
>
> James
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