Re: Slow ops on OSDs

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On 2020-10-06 14:18, Kristof Coucke wrote:
> Ok, I did the compact on 1 osd.
> The utilization is back to normal, so that's good... Thumbs up to you guys!

We learned the hard way, but happy to spot the issue and share the info.

> Though, one thing I want to get out of the way before adapting the other
> OSDs:
> When I now get the RocksDb stats, my L1, L2 and L3 are gone:

I guess that they have all been merged now. On a OSD with L0 and L1 I
see L0 disappear after a compact. After a restart, recovery, and then
dumping stats again it's there again. So yeah, it gets created
automatically.

> 
> We use the NVMe's to store the RocksDb, but with the spillover towards
> the spinning drives.
> L4 is intended to be stored on the spinning drives... 
> Will the other levels be created automatically?

Yeah pretty sure that's how RocksDB works, and tested that (see above).

Gr. Stefan
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