Op 28 okt. 2016 om 11:52 heeft Kees Meijs < kees@xxxxxxxx> het volgende geschreven:
Hi Cephers,
Using Ceph 0.94.9-1trusty we noticed severe I/O stalling during
deep scrubbing (vanilla parameters used in regards to scrubbing).
I'm aware this has been discussed before, but I'd like to share
the parameters we're going to evaluate:
- osd_scrub_begin_hour 1
- osd_scrub_end_hour 7
I don't like this personally. Your cluster should be capable of doing a deep scrub at any moment. If not it will also not be able to handle a node failure during peak times.
- osd_scrub_min_interval 259200
- osd_scrub_max_interval 1814400
- osd_scrub_chunk_max 5
- osd_scrub_sleep .1
You can try to bump that even more.
Wido
- osd_deep_scrub_interval 1814400
- osd_deep_scrub_stride 1048576
Anyway, thoughts on the matter or specific parameter advice is
more than welcome.
Cheers,
Kees
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