Re: Manual deep scrub

Richard Arends <cephmailinglist@xxxxxxxxx> · Tue, 17 Jan 2017 16:27:47 +0100

    On 01/17/2017 04:09 PM, David Turner
      wrote:

      Hi,

      You want to look into the settings
        osd_max_scrubs which indicates how many different scrub
        operations an OSD can be involved in at once

    That's still the default, thus 1. A pg that i wanted to deep-scrub
    this afternoon, should be done by an OSD that was not doing another
    deep-scrub. Also that OSD was not busy with anything else. So to my
    knowledge, the deep-scrub should start.

       (the well chosen default is 1), as
        well as osd_scrub_max_interval and osd_deep_scrub_interval.  One
        of the differences in your cluster from before to now is time.

        It might be that you're PGs are running into their max interval
        and forcing to scrub now which is interfering with your script. 
        We also manage our deep scrubs with a cron and have set our
        osd_deep_scrub_scrub interval to longer than it will take our
        cron to go through all of the PGs so that they will never
        automatically deep scrub themselves.

    We are doing the same in our cluster, i also set the the
    osd_deep_scrub_interval to a high value. The normal scrub intervals
    (osd_scrub_min_interval and osd_scrub_max_interval) are set to the
    defaults (1 day and 1 week).

    -- 
Regards,

Richard.

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