For what it's worth, version 0.79 has different headers, and the awk
command needs $19 instead of $20. But here is the output I have on a small
cluster that I recently rebuilt:
$ ceph pg dump all | grep active | awk '{ print $19}' | sort -k1 | uniq -c
dumped all in format plain
1 2014-05-15
2 2014-05-17
19 2014-05-18
193 2014-05-19
105 2014-05-20
I have set noscrub and nodeep-scrub, as well as noout and nodown off and on
while I performed various maintenance, but that hasn't (apparently) impeded
the regular schedule.
With what frequency are you setting the nodeep-scrub flag?
-Aaron
On Tue, May 20, 2014 at 5:21 PM, Mike Dawson <[email protected]>wrote:
> Today I noticed that deep-scrub is consistently missing some of my
> Placement Groups, leaving me with the following distribution of PGs and the
> last day they were successfully deep-scrubbed.
>
> # ceph pg dump all | grep active | awk '{ print $20}' | sort -k1 | uniq -c
> 5 2013-11-06
> 221 2013-11-20
> 1 2014-02-17
> 25 2014-02-19
> 60 2014-02-20
> 4 2014-03-06
> 3 2014-04-03
> 6 2014-04-04
> 6 2014-04-05
> 13 2014-04-06
> 4 2014-04-08
> 3 2014-04-10
> 2 2014-04-11
> 50 2014-04-12
> 28 2014-04-13
> 14 2014-04-14
> 3 2014-04-15
> 78 2014-04-16
> 44 2014-04-17
> 8 2014-04-18
> 1 2014-04-20
> 16 2014-05-02
> 69 2014-05-04
> 140 2014-05-05
> 569 2014-05-06
> 9231 2014-05-07
> 103 2014-05-08
> 514 2014-05-09
> 1593 2014-05-10
> 393 2014-05-16
> 2563 2014-05-17
> 1283 2014-05-18
> 1640 2014-05-19
> 1979 2014-05-20
>
> I have been running the default "osd deep scrub interval" of once per
> week, but have disabled deep-scrub on several occasions in an attempt to
> avoid the associated degraded cluster performance I have written about
> before.
>
> To get the PGs longest in need of a deep-scrub started, I set the
> nodeep-scrub flag, and wrote a script to manually kick off deep-scrub
> according to age. It is processing as expected.
>
> Do you consider this a feature request or a bug? Perhaps the code that
> schedules PGs to deep-scrub could be improved to prioritize PGs that have
> needed a deep-scrub the longest.
>
> Thanks,
> Mike Dawson
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>
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