Hello collective wisdom, fio-3.12 + CEPH 13.2.2 (mimic) here. So it appears that unlike file based engines such as libaio where --filename allows for multiple block devices to be specified on the same line, --rbdname of RBD engine, doesn't accept multiple rbd images separated by colon (:). If that's indeed the case, is it possible to enable such functionality? If yes, how can I put in a request? While at this, will the IO be spread evenly among the RBD images, if I specify multiple rbdname like below? [global] invalidate=0 ioengine=rbd clientname=cephuser clustername=ceph pool=rbd rw=randwrite bs=4k [rbd_iodepth32] iodepth=32 rbdname=image0 rbdname=image1 -- Michael