If deep-scrubbing is causing a performance problem, you're going to be
very unhappy during recovery. I think you'd be better off improving
performance so that you can handle normal deep-scrubbing.
If you still want to proceed, I wouldn't set the nodeep-scrub flag. I'd
adjust the scrubbing variables:
osd scrub load threshold
osd scrub min interval
osd scrub max interval
osd deep scrub interval
(See
https://ceph.com/docs/master/rados/configuration/osd-config-ref/#scrubbing)
If you increase the deep scrub interval to something like a month, then
run a weekly cron, that should solve your problem without the warning.
If the cron fails, deep-scrubbing will still happen once a month.
Deep-scrubbing manually is relatively easy, run ceph pg deep-scrub
<pg_id>. You can get a list of the pg_id's from ceph pg dump. If
you're doing that in a script, you might prefer ceph pg dump --format=json.
The pg dump contains last_scrub, scrub_stamp, last_deep_scrub, and
deep_scrub_stamp for each PG. You might want to sort the PGs by
last_deep_scrub, and do the oldest one first. There's a lot of
information here that your script can use to make this manually
scrubbing work better for you.
On 5/20/14 02:29 , Ta Ba Tuan wrote:
Dear Yang,
I planed set nodeep-scrub at nigh daily by crontab.
and with error "HEALTH_WARN nodeep-scrub flag(s) set". I only
concentrate messages from the monitoring tool (vd: nagios) => and I
re-writed nagios'checkscript to with message "HEALTH_WARN nodeep-scrub
flag(s) set" returns code = 0.
On 05/20/2014 10:47 AM, Jianing Yang wrote:
I found that deep scrub has a significant impact on my cluster. I've
used "ceph osd set nodeep-scrub" disable it. But I got an error
"HEALTH_WARN nodeep-scrub flag(s) set". What is the proper way to
disable deep scrub? and how can I run it manually?
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