Hi Josh, thanks for the info. detach/reattach schould be fine for me, because it's only for performance testing. #2468 would be fine of course. Udo On 05.02.2015 08:02, Josh Durgin wrote: > On 02/05/2015 07:44 AM, Udo Lembke wrote: >> Hi all, >> is there any command to flush the rbd cache like the >> "echo 3 > /proc/sys/vm/drop_caches" for the os cache? > > librbd exposes it as rbd_invalidate_cache(), and qemu uses it > internally, but I don't think you can trigger that via any user-facing > qemu commands. > > Exposing it through the admin socket would be pretty simple though: > > http://tracker.ceph.com/issues/2468 > > You can also just detach and reattach the device to flush the rbd cache. > > Josh _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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