Recommendation to safely avoid problems with osd-failure

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Hi,

I'm trying to compile a strategy to avoid performance problems if osds
or osd hosts fails.

If I encounter a re-balance of one OSD during mid-day, there'll be
problems with performance right now, if I could see the issue and let it
re-balance during evening, that would be great.

I.e. if two OSD hosts dies around the same time I suspect that the
clients would suffer greatly.

Currently the osd has the following settings

     osd max backfills = 1
     osd recovery max active = 1

Is there any general guidance or recommendation for unexpected outages?

Cheers,
Josef Johansson


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