Re: slow requests and high i/o / read rate on bluestore osds after upgrade 12.2.8 -> 12.2.10

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What's the output of "ceph daemon osd.<X> status" on one of the OSDs
while it's starting?

Is the OSD crashing and being restarted all the time? Anything weird
in the log files? Was there recovery or backfill during the upgrade?

Paul

-- 
Paul Emmerich

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On Mon, Jan 14, 2019 at 8:35 PM Stefan Priebe - Profihost AG
<s.priebe@xxxxxxxxxxxx> wrote:
>
> Hi,
>
> while trying to upgrade a cluster from 12.2.8 to 12.2.10 i'm experience
> issues with bluestore osds - so i canceled the upgrade and all bluestore
> osds are stopped now.
>
> After starting a bluestore osd i'm seeing a lot of slow requests caused
> by very high read rates.
>
>
> Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
> avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
> sda              45,00   187,00  767,00   39,00 482040,00  8660,00
> 1217,62    58,16   74,60   73,85   89,23   1,24 100,00
>
> it reads permanently with 500MB/s from the disk and can't service client
> requests. Overall client read rate is at 10.9MiB/s rd
>
> I can't reproduce this with 12.2.8. Is this a known bug / regression?
>
> Greets,
> Stefan
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