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Very slow ceph recovery

asked 2017-08-11 09:53:18 -0600

Damian Dąbrowski gravatar image

Hello,

I've got a problem with one OSD. I've added 3 more OSD and started objects recovery.

Recovery IO is quite fast(~50mb/s) but degraded objects decreasing incredibly slowly(~0,03% per minute).

My ceph cluster have 7 disks 2TB HDD with only ~1TB data.

Can I ask why this could take so long? Now i have 20% degraded objects, with this speed recovery 1TB data will took about 10 hours.

Is there any way to speed up this process?

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answered 2018-05-03 13:07:00 -0600

nh2 gravatar image

It might be this bug: https://tracker.ceph.com/issues/23595#note-8 (https://tracker.ceph.com/issues/23595...)

Try

ceph tell 'osd.*' config set osd_recovery_sleep_hdd 0
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Asked: 2017-08-11 09:53:18 -0600

Seen: 753 times

Last updated: Aug 11 '17