> Op 3 nov. 2016 om 19:13 heeft Joao Eduardo Luis <joao@xxxxxxx> het volgende geschreven:
>
>> On 11/03/2016 05:52 PM, wido@xxxxxxxx wrote:
>>
>>
>>>> Op 3 nov. 2016 om 16:44 heeft Joao Eduardo Luis <joao@xxxxxxx> het volgende geschreven:
>>>>
>>>>> On 11/03/2016 01:24 PM, Wido den Hollander wrote:
>>>>>
>>>>> Op 3 november 2016 om 13:09 schreef Joao Eduardo Luis <joao@xxxxxxx>:
>>>>>
>>>>>
>>>>>> On 11/03/2016 09:40 AM, Wido den Hollander wrote:
>>>>>> root@mon3:/var/lib/ceph/mon# ceph-monstore-tool ceph-mon3 dump-keys|awk '{print $1}'|uniq -c
>>>>>> 96 auth
>>>>>> 1143 logm
>>>>>> 3 mdsmap
>>>>>> 1 mkfs
>>>>>> 1 mon_sync
>>>>>> 6 monitor
>>>>>> 3 monmap
>>>>>> 1158 osdmap
>>>>>> 358364 paxos
>>>>>> 656 pgmap
>>>>>> 6 pgmap_meta
>>>>>> 168 pgmap_osd
>>>>>> 6144 pgmap_pg
>>>>>> root@mon3:/var/lib/ceph/mon#
>>>>>>
>>>>>> So there are 358k Paxos entries in the Mon store.
>>>>>>
>>>>>> Any suggestions on how to trim those from the MON store(s)?
>>>>>
>>>>> Can you check the value of paxos:first_committed in the store?
>>>>>
>>>>
>>>> Here you go:
>>>>
>>>> root@mon3:~# ceph-monstore-tool /var/lib/ceph/mon/ceph-mon3 show-versions --map-type paxos
>>>> first committed: 174349108
>>>> last committed: 174349609
>>>> root@mon3:~#
>>>>
>>>> Doesn't seem like a lot of keys in there?
>>>
>>> I have this annoying feeling that this relates to some really old bug I can't really recall the ticket number, but in essence was not trimming the maps even though first_committed was updated.
>>>
>>> The one way out of this I can think of is to change the value of 'first_committed' in the store to the very first paxos epoch you have. You will have to use 'ceph_kvstore_tool' to do that.
>>>
>>
>> Is one mon enough? So stop that mon, change the value and start it again?
>>
>> Or do I need to do this on a mon which will become primary?
>
> Sorry for not being clear. This needs to be done on the one that will become the leader.
>
Ok! Np
> Personally, I don't like this solution one bit, but I can't see any other way without a patched monitor, or maybe ceph_monstore_tool.
>
> If you are willing to wait till tomorrow, I'll be happy to kludge a sanitation feature onto ceph_monstore_tool that will clean those versions for you (latency being due to coding + testing + building).
>
Yes, no rush. I will wait. Thanks!
Wido
> -Joao
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