Hi, Anyone got tips as to how to best benchmark a Ceph blockdevice (RBD)?
I've currently found the more traditional ways (dd, iostat, bonnie++, phoronix test suite) and fio which actually supports the rbd-engine. Though there's not a lot of information about it to be found online (contrary to e.g. benchmarking zfs). Currently I'm using this, closest to the usage of BackupPC-software available (small randreads) with fio: [global] ioengine=rbd clientname=admin pool=[poolname] rbdname=[rbdname] rw=randread randrepeat=1 direct=1 ramp_time=4 bs=4k [rbd_iodepth32] iodepth=32 Any ideas (or questions) welcome ! Nino
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