I don't know if/why they're not documented, but we use them plus the
scrub stride and iopriority options too:

[osd]
  osd scrub sleep = .1
  osd disk thread ioprio class = idle
  osd disk thread ioprio priority = 0
  osd scrub chunk max = 5
  osd deep scrub stride = 1048576

Cheers, Dan

On Wed, Jun 10, 2015 at 8:38 AM, PaweÅ‚ Sadowski <[email protected]> wrote:
> Hello Everyone,
>
>   There are some options[1] that greatly reduces deep-scrub performance
> impact but they are not documented anywhere. Is there any reason for this?
>
> 1:
>  - osd_scrub_sleep
>  - osd_scrub_chunk_min
>  - osd_scrub_chunk_max
>
>
> --
> PS
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