purging strays faster

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Thanks for the suggestion, however I think my more immediate problem is 
the ms_handle_reset messages. I do not think the mds are getting the 
updates when I send them.

Dan

On 03/04/2017 09:08 AM, John Spray wrote:
> On Fri, Mar 3, 2017 at 9:48 PM, Daniel Davidson
> <danield at igb.illinois.edu> wrote:
>> ceph daemonperf mds.ceph-0
>> -----mds------ --mds_server-- ---objecter--- -----mds_cache-----
>> ---mds_log----
>> rlat inos caps|hsr  hcs  hcr |writ read actv|recd recy stry purg|segs evts
>> subm|
>>    0  336k  97k|  0    0    0 |  0    0   20 |  0    0 246k   0 | 31   27k
>> 0
>>    0  336k  97k|  0    0    0 |112    0   20 |  0    0 246k  55 | 31   26k
>> 55
>>    0  336k  97k|  0    1    0 | 90    0   20 |  0    0 246k  45 | 31   26k
>> 45
>>    0  336k  97k|  0    0    0 |  2    0   20 |  0    0 246k   1 | 31   26k
>> 1
>>    0  336k  97k|  0    0    0 |166    0   21 |  0    0 246k  83 | 31   26k
>> 83
>>
>> I have too many strays that seem to be causing disk full errors when
>> deleting man files (hundreds of thousands)  the number here is down from
>> over 400k.  I have been trying to up the number of processes to do this, but
>> it is not happening:
>>
>> ceph tell mds.ceph-0 injectargs --mds-max-purge-ops-per-pg 2
>> 2017-03-03 15:44:00.606548 7fd96400a700  0 client.225772 ms_handle_reset on
>> 172.16.31.1:6800/55710
>> 2017-03-03 15:44:00.618556 7fd96400a700  0 client.225776 ms_handle_reset on
>> 172.16.31.1:6800/55710
>> mds_max_purge_ops_per_pg = '2'
>>
>> ceph tell mds.ceph-0 injectargs --mds-max-purge-ops 16384
>> 2017-03-03 15:45:27.256132 7ff6d900c700  0 client.225808 ms_handle_reset on
>> 172.16.31.1:6800/55710
>> 2017-03-03 15:45:27.268302 7ff6d900c700  0 client.225812 ms_handle_reset on
>> 172.16.31.1:6800/55710
>> mds_max_purge_ops = '16384'
>>
>> I do have a backfill running as I also have a new node that is almost done.
>> Any ideas as to what is going on here?
> Try also increasing mds_max_purge_files.    If your files are small
> then that is likely to be the bottleneck.
>
> John
>
>> Dan
>>
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>> ceph-users at lists.ceph.com
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com




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