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

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Hi,

On Thu, Jul 7, 2022 at 2:37 PM Konstantin Shalygin <k0ste@xxxxxxxx> wrote:
>
> Hi,
>
> On 7 Jul 2022, at 13:04, Dan van der Ster <dvanders@xxxxxxxxx> wrote:
>
> I'm not sure the html mail made it to the lists -- resending in plain text.
> I've also opened https://tracker.ceph.com/issues/56488
>
>
> I think with pacific you need to redeploy all OSD's to respect the new default bluestore_min_alloc_size_hdd = 4096 [1]
> Or not? 🙂
>

Understood, yes, that is another "solution". But it is incredibly
impractical, I would say impossible, for loaded production
installations.
(How is one supposed to redeploy OSDs on a multi-PB cluster while the
performance is degraded?)

-- Dan

>
> [1] https://github.com/ceph/ceph/pull/34588
>
> k
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