Re: Tons of "cls_rgw.cc:3284: gc_iterate_entries end_key=" records in OSD logs

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That message has been there since 2014. We should lower the log level though.

Yehuda

On Mon, Aug 20, 2018 at 6:08 AM, David Turner <drakonstein@xxxxxxxxx> wrote:
> In luminous they consolidated a lot of the rgw metadata pools by using
> namespace inside of the pools. I would say that the GC pool was consolidated
> into the log pool based on the correlation you've found with the primary
> osds.  At least that mystery is solved as to why those 8 osds. I don't know
> why there logs are being spammed with GC messages though. Hopefully someone
> else can shed a light on that. I cc'd Yehuda on this, the primary RGW dev.
>
>
> On Mon, Aug 20, 2018, 7:09 AM Jakub Jaszewski <jaszewski.jakub@xxxxxxxxx>
> wrote:
>>
>> Hi David,
>>
>> Right, we use this cluster (v12.2.5, fresh installation) for RGW, however,
>> I don't see default.rgw.gc pool like we have on other cluster which was
>> upgraded to Luminous, 10.2.9 -> 10.2.10 -> 12.2.2 (I believe that
>> default.rgw.gc pool is there from the time of setting up RGW on Jewel
>> version and the pool was automatically created).
>>
>> On impacted cluster we have below pools
>> pool 1 '.rgw.root' replicated size 3 min_size 2 crush_rule 2 object_hash
>> rjenkins pg_num 8 pgp_num 8 last_change 1499 flags hashpspool stripe_width 0
>> application rgw
>> pool 2 'rbd' replicated size 3 min_size 2 crush_rule 2 object_hash
>> rjenkins pg_num 2048 pgp_num 2048 last_change 2230 flags hashpspool
>> stripe_width 0 application rbd
>> pool 3 'default.rgw.control' replicated size 3 min_size 2 crush_rule 2
>> object_hash rjenkins pg_num 8 pgp_num 8 last_change 1501 flags hashpspool
>> stripe_width 0 application rgw
>> pool 4 'default.rgw.meta' replicated size 3 min_size 2 crush_rule 2
>> object_hash rjenkins pg_num 8 pgp_num 8 last_change 1491 flags hashpspool
>> stripe_width 0 application rgw
>> pool 5 'default.rgw.log' replicated size 3 min_size 2 crush_rule 2
>> object_hash rjenkins pg_num 8 pgp_num 8 last_change 1486 flags hashpspool
>> stripe_width 0 application rgw
>> pool 7 'default.rgw.buckets.index' replicated size 3 min_size 2 crush_rule
>> 2 object_hash rjenkins pg_num 8 pgp_num 8 last_change 1483 owner
>> 18446744073709551615 flags hashpspool stripe_width 0 application rgw
>> pool 8 'default.rgw.buckets.data' erasure size 12 min_size 10 crush_rule 3
>> object_hash rjenkins pg_num 2048 pgp_num 2048 last_change 2228 flags
>> hashpspool max_bytes 879609302220800 stripe_width 36864 application rgw
>> pool 9 'default.rgw.buckets.non-ec' replicated size 3 min_size 2
>> crush_rule 2 object_hash rjenkins pg_num 8 pgp_num 8 last_change 1506 owner
>> 18446744073709551615 flags hashpspool stripe_width 0 application rgw
>>
>> Eight annoying OSDs match to primary OSDs of PGs that make default.rgw.log
>> pool.
>>
>> Many thanks
>> Jakub
>>
>>
>> On Mon, Aug 20, 2018 at 11:54 AM David Turner <drakonstein@xxxxxxxxx>
>> wrote:
>>>
>>> I'm assuming you use RGW and that you have a GC pool for RGW. It also
>>> might beat assumed that your GC pool only has 8 PGs.  Are any of those
>>> guesses correct?
>>>
>>> On Mon, Aug 20, 2018, 5:13 AM Jakub Jaszewski <jaszewski.jakub@xxxxxxxxx>
>>> wrote:
>>>>
>>>> Issue tracker http://tracker.ceph.com/issues/23801.
>>>> Still don't know why only particular OSDs write this information to log
>>>> files.
>>>>
>>>> Jakub
>>>>
>>>> On Wed, Aug 8, 2018 at 12:02 PM Jakub Jaszewski
>>>> <jaszewski.jakub@xxxxxxxxx> wrote:
>>>>>
>>>>> Hi All, exactly the same story today, same 8 OSDs and a lot of garbage
>>>>> collection objects to process
>>>>>
>>>>> Below is the number of "cls_rgw.cc:3284: gc_iterate_entries end_key="
>>>>> entries per OSD log file
>>>>> hostA:
>>>>>   /var/log/ceph/ceph-osd.58.log
>>>>>   1826467
>>>>> hostB:
>>>>>   /var/log/ceph/ceph-osd.88.log
>>>>>   2924241
>>>>> hostC:
>>>>>   /var/log/ceph/ceph-osd.153.log
>>>>>   581002
>>>>>   /var/log/ceph/ceph-osd.164.log
>>>>>   3278606
>>>>> hostD:
>>>>>   /var/log/ceph/ceph-osd.95.log
>>>>>   1426963
>>>>> hostE:
>>>>>   /var/log/ceph/ceph-osd.4.log
>>>>>   2716914
>>>>>   /var/log/ceph/ceph-osd.53.log
>>>>>   943749
>>>>> hostF:
>>>>>   /var/log/ceph/ceph-osd.172.log
>>>>>   4085334
>>>>>
>>>>>
>>>>> # radosgw-admin gc list --include-all|grep oid |wc -l
>>>>> 302357
>>>>> #
>>>>>
>>>>> Can anyone please explain what is going on ?
>>>>>
>>>>> Thanks!
>>>>> Jakub
>>>>>
>>>>> On Tue, Aug 7, 2018 at 3:03 PM Jakub Jaszewski
>>>>> <jaszewski.jakub@xxxxxxxxx> wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> 8 out of 192 OSDs in our cluster (version 12.2.5) write plenty of
>>>>>> records like "cls_rgw.cc:3284: gc_iterate_entries end_key=" to the
>>>>>> corresponding log files, e.g.
>>>>>>
>>>>>> 2018-08-07 04:34:06.000585 7fdd8f012700  0 <cls>
>>>>>> /build/ceph-12.2.5/src/cls/rgw/cls_rgw.cc:3284: gc_iterate_entries
>>>>>> end_key=1_01533616446.000580407
>>>>>> 2018-08-07 04:34:06.001888 7fdd8f012700  0 <cls>
>>>>>> /build/ceph-12.2.5/src/cls/rgw/cls_rgw.cc:3284: gc_iterate_entries
>>>>>> end_key=1_01533616446.001886318
>>>>>> 2018-08-07 04:34:06.003395 7fdd8f012700  0 <cls>
>>>>>> /build/ceph-12.2.5/src/cls/rgw/cls_rgw.cc:3284: gc_iterate_entries
>>>>>> end_key=1_01533616446.003390299
>>>>>> 2018-08-07 04:34:06.005205 7fdd8f012700  0 <cls>
>>>>>> /build/ceph-12.2.5/src/cls/rgw/cls_rgw.cc:3284: gc_iterate_entries
>>>>>> end_key=1_01533616446.005200341
>>>>>>
>>>>>> # grep '2018-08-07 04:34:06' /var/log/ceph/ceph-osd.4.log |wc -l
>>>>>> 712
>>>>>> #
>>>>>>
>>>>>> At the same time there were like 500 000 expired garbage collection
>>>>>> objects.
>>>>>>
>>>>>> Log level of OSD subsystem is set to default 1/5 across all OSDs.
>>>>>>
>>>>>> I wonder why only few OSDs record this information and is it something
>>>>>> to be logged in log level = 1 or maybe higher?
>>>>>> https://github.com/ceph/ceph/blob/v12.2.5/src/cls/rgw/cls_rgw.cc#L3284
>>>>>>
>>>>>> Thanks
>>>>>> Jakub
>>>>
>>>> _______________________________________________
>>>> ceph-users mailing list
>>>> ceph-users@xxxxxxxxxxxxxx
>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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