Hi Brian,
TL;DR: bluefs_buffered_io = true and SWAP-enabled OSD nodes do not work well
together.
Please review these two PRs [1] and [2] to understand the rationale behind
bluefs_buffered_io and why its default value has changed over time and Ceph
releases (from true to false, then back to tr
> On Mar 19, 2025, at 4:44 AM, Frédéric Nass
> wrote:
>
>
> Hi Brian,
>
> TL;DR: bluefs_buffered_io = true and SWAP-enabled OSD nodes do not work well
> together.
>
> Please review these two PRs [1] and [2] to understand the rationale behind
> bluefs_buffered_io and why its default value
> 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) ...
We're not using RGW, only RBD.
Currently I find it hard to prevent
Den mån 17 mars 2025 kl 14:48 skrev Joshua Baergen :
> 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
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.
