Very slow ceph recovery

asked 2017-08-11 09:53:18 -0500

Damian Dąbrowski gravatar image


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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