That would make sense. Here's what the metadata rule looks like:
rule metadata {
ruleset 1
type replicated
min_size 2
max_size 10
step take default
step chooseleaf firstn 0 type host
step emit
}
On Tue, Jan 8, 2013 at 3:23 PM, Gregory Farnum <greg@xxxxxxxxxxx> wrote:
> What are your CRUSH rules? Depending on how you set this cluster up,
> it might not be placing more than one replica in a single host, and
> you've only got two hosts so it couldn't satisfy your request for 3
> copies.
> -Greg
>
> On Tue, Jan 8, 2013 at 2:11 PM, Bryan Stillwell
> <bstillwell@xxxxxxxxxxxxxxx> wrote:
>> I tried increasing the number of metadata replicas from 2 to 3 on my
>> test cluster with the following command:
>>
>> ceph osd pool set metadata size 3
>>
>>
>> Afterwards it appears that all the metadata placement groups switch to
>> a degraded state and doesn't seem to be attempting to recover:
>>
>> 2013-01-08 14:49:37.352735 mon.0 [INF] pgmap v156393: 1920 pgs: 1280
>> active+clean, 640 active+degraded; 903 GB data, 1820 GB used, 2829 GB
>> / 4650 GB avail; 1255/486359 degraded (0.258%)
>>
>>
>> Does anything need to be done after increasing the number of replicas?
>>
>> Here's what the OSD tree looks like:
>>
>> root@a1:~# ceph osd tree
>> dumped osdmap tree epoch 1303
>> # id weight type name up/down reweight
>> -1 4.99557 pool default
>> -3 4.99557 rack unknownrack
>> -2 2.49779 host b1
>> 0 0.499557 osd.0 up 1
>> 1 0.499557 osd.1 up 1
>> 2 0.499557 osd.2 up 1
>> 3 0.499557 osd.3 up 1
>> 4 0.499557 osd.4 up 1
>> -4 2.49779 host b2
>> 5 0.499557 osd.5 up 1
>> 6 0.499557 osd.6 up 1
>> 7 0.499557 osd.7 up 1
>> 8 0.499557 osd.8 up 1
>> 9 0.499557 osd.9 up 1
>>
>>
>> Thanks,
>> Bryan
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