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List:       opensuse
Subject:    Re: mdraid scrubbing collides with iscsi
From:       "David C. Rankin" <drankinatty () suddenlinkmail ! com>
Date:       2023-12-05 0:40:03
Message-ID: ade4d503-d74f-480e-a563-70d782fb370e () suddenlinkmail ! com
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On 12/4/23 08:31, Per Jessen wrote:
> I think I have seen that, but what I am missing is a way to de-prioritize
> the scrubbing.
> 

Good question,

   Since it isn't a userland process, I don't think renice would do any good. 
But I do recall a specific way to specify the scrub speed (or whatever the 
technical term is) that you could lower that would in effect de-prioritize the 
scrubbing (I always tried to go the other way).

   What I can't recall is which /proc/xxxx or the like you use to interact 
with the setting. ... Ahhh, it is

   /proc/sys/dev/raid/speed_limit_max

   For a quick ref, See: 
https://www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html



-- 
David C. Rankin, J.D.,P.E.
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