Re: Ceph recovery network speed

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On 6/29/22 14:58, Frank Schilder wrote:
Dear Stefan,

this looks like a terrible "improvement" as it implies a large number of redundant object movements together with an unnecessarily and hugely prolonged state of rebalancing. So far I always disabled rebalancing/recovery, added new OSDs, increased PG[P]_num, waited for peering and let ceph loose. Everything was distributed and went to the right place in one go and was finished after 2-3 weeks (ca. 1000 OSDs now).

Is there really no way to do this in an atomic operation any more? Would target_max_misplaced_ratio=100% do the trick?

I have tried this on a few test clusters ... and it indeed seems to do the trick.

Gr. Stefan
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