Re: active+undersized+degraded

[Burkhard Linke <Burkhard.Linke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi,

On 12/17/2015 01:41 PM, Dan Nica wrote:

And the osd tree:

 

$ ceph osd tree

ID WEIGHT   TYPE NAME     UP/DOWN REWEIGHT PRIMARY-AFFINITY

-1 21.81180 root default

-2 21.81180     host rimu

0  7.27060         osd.0      up  1.00000          1.00000

1  7.27060         osd.1      up  1.00000          1.00000

2  7.27060         osd.2      up  1.00000          1.00000

the default CRUSH rulesets distribute PG replicates across hosts. With a single host the rules are not able to find a second OSD for the replicates.

Solutions:
- add a second host     - or -
- change CRUSH ruleset to distribute based on OSDs instead of hosts.

Regards,
Burkhard

-- 
Dr. rer. nat. Burkhard Linke
Bioinformatics and Systems Biology
Justus-Liebig-University Giessen
35392 Giessen, Germany
Phone: (+49) (0)641 9935810

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