OK I recreated one OSD. It now has 4k min_alloc_size: 2022-07-14T10:52:58.382+0200 7fe5ec0aa200 1 bluestore(/var/lib/ceph/osd/ceph-0/) _open_super_meta min_alloc_size 0x1000 and I tested all these bluestore_prefer_deferred_size_hdd values: 4096: not deferred 4097: "_do_alloc_write deferring 0x1000 write via deferred" 65536: "_do_alloc_write deferring 0x1000 write via deferred" 65537: "_do_alloc_write deferring 0x1000 write via deferred" With bluestore_prefer_deferred_size_hdd = 64k, I see that writes up to 0xf000 are deferred, e.g.: _do_alloc_write deferring 0xf000 write via deferred Cheers, Dan On Thu, Jul 14, 2022 at 9:37 AM Konstantin Shalygin <k0ste@xxxxxxxx> wrote: > > Dan, do you tested the redeploy one of your OSD with default pacific bluestore_min_alloc_size_hdd (4096) ? > This will also resolves this issue (just not affected, when all options in their defaults)? > > > Thanks, > k > > On 14 Jul 2022, at 08:43, Dan van der Ster <dvanders@xxxxxxxxx> wrote: > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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