20 Mar
2020
20 Mar
'20
3:28 p.m.
Yup, but you need 15.1.z OSDs as well as 15.1.z librbd. Also ensure you run "ceph osd require-osd-release octopus" otherwise it won't use the new sparse-copyup since older OSDs don't have the necessary support.
OK, I've just upgraded my test cluster to 15.1.1 and tried to test this feature. It didn't seem to work. I tested it with: fio -ioengine=rbd -direct=1 -name=test -bs=64k -iodepth=1 -rw=randwrite -pool=rpool_hdd -rbdname=testimg3_clone The result was 10 iops while `ceph -s` reported 40 MB/s write... Just in case if it depends on min_alloc_size I've also tested it with bs=64k with the same result. Is there anything else I should do to get it working? -- Vitaliy Filippov