Hey Brian, The setting you're looking for is bluefs_buffered_io. This is very much a YMMV setting, so it's best to test with both modes, but I usually recommend turning it off for all but omap-intensive workloads (e.g. RGW index) due to it causing writes to tend to be split up into smaller pieces. It's been a long time since I've thought about this setting, so even though it might be toggleable live, I'm not sure how much I would trust turning it off on a live OSD; we usually set it in local conf and then restart OSDs to gain the new setting. Josh On Sun, Mar 16, 2025 at 2:38 PM Brian Marcotte <marcotte@xxxxxxxxx> wrote: > > Some years ago when first switching to Bluestore, I could see that > ceph-osd wasn't using the host page cache anymore. Some time later after > a Ceph upgrade, I found that ceph-osd was now filling the page cache. I'm > sorry I don't remember which upgrade that was. Currently I'm running > pacific and reef clusters. > > Should ceph-osd (Bluestore) be going through the page cache? Can ceph-osd > be configured to go direct? > > Thanks. > > -- > - Brian > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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