Hi,
This helped to disable deferred writes in my case:
bluestore_min_alloc_size=4096
bluestore_prefer_deferred_size=0
bluestore_prefer_deferred_size_ssd=0
If you already deployed your OSDs with min_alloc_size=4K then you don't
need to redeploy them again.
Hi Vitality,
I completely destroyed the test cluster and re-deployed it after
changing these settings but it did not make a difference - there are
still a high number of deferred writes.
Regards
--
Brad.
On Wed, 5 Feb 2020 at 10:55, <vitalif@xxxxxxxxxx> wrote:
min_alloc_size can't be changed after formatting an OSD, and yes,
bluestore defers all writes that are < min_alloc_size. And default
min_alloc_size_ssd is 16KB.
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