Re: [ceph-users] pacific doesn't defer small writes for pre-pacific hdd osds

[Konstantin Shalygin <k0ste@xxxxxxxx>]

On 7 Jul 2022, at 15:41, Dan van der Ster <dvanders@xxxxxxxxx> wrote:

How is one supposed to redeploy OSDs on a multi-PB cluster while the
performance is degraded?

This is very strong point of view!

Good that this case can be fixed with set bluestore_prefer_deferred_size_hdd to 128k, and I think we need analyze answer from Igor

* this is bug

* bluestore_prefer_deferred_size_hdd should be increased by operator, until migration to 4k will finished

k

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