Need help for PG problem

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Hi Zhang,

yeah i saw your answer already.

At very first, you should make sure that there is no clock skew.
This can cause some sideeffects.

----

According to

http://docs.ceph.com/docs/master/rados/operations/placement-groups/

you have to:

            (OSDs * 100)
Total PGs =  ------------
              pool size


Means:

20 OSD's of you * 100 = 2000

Poolsize is:

Where pool size is either the number of replicas for replicated pools or
the K+M sum for erasure coded pools (as returned by ceph osd
erasure-code-profile get).

--

So lets say, you have 2 replications, you should have 1000 PG's.

If you have 3 replications, you should have 2000 / 3 = 666 PG's.

But you configured 4096 PGs. Thats simply far too much.

Reduce it. Or, if you can not, get more OSD's into this.

I dont know any other way.

Good luck !

-- 
Mit freundlichen Gruessen / Best regards

Oliver Dzombic
IP-Interactive

mailto:info@xxxxxxxxxxxxxxxxx

Anschrift:

IP Interactive UG ( haftungsbeschraenkt )
Zum Sonnenberg 1-3
63571 Gelnhausen

HRB 93402 beim Amtsgericht Hanau
Geschäftsführung: Oliver Dzombic

Steuer Nr.: 35 236 3622 1
UST ID: DE274086107


Am 22.03.2016 um 19:02 schrieb Zhang Qiang:
> Hi Oliver, 
> 
> Thanks for your reply to my question on Ceph mailing list. I somehow
> wasn't able to receive your reply in my mailbox, but I saw your reply in
> the archive, so I have to mail you personally.
> 
> I have pasted the whole ceph health output on gist:
> https://gist.github.com/dotSlashLu/22623b4cefa06a46e0d4 
> 
> Hope this will help. Thank you!
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