Hi All, This is neto from Brazil How are you? I have captured a blktrace from an Oracle workload. 18 dm devices. Steps to capture: blktrace <device 0> <device 1> ... -w 40 blkparse -i <device 0> -i <device 1> ... -o /dev/null -d oracle_trace.out Trying to replay with FIO (here I have 2 devices - /dev/sdh and /dev/sdi) Testing with one device: [workload] ioengine=libaio iodepth=1 size=100g numjobs=1 direct=1 thread read_iolog=/root/traces/oracle-s144/oracle_trace.out replay_no_stall=1 replay_redirect=/dev/sdh [root@oraperf1 fio]# ./fio oracle-replay.cfg workload: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=1 fio-2.2.9-26-g669e Starting 1 thread fio: ioengines.c:422: td_io_open_file: Assertion `!fio_file_open(f)' failed. Aborted (core dumped) Questions: 1) The workload that I capture, all DM devices have 200GB size. My devices where I want to replay have 100GB. I believe I will need to match the size of all disks (where I captured the workload) with the destination where I am going to replay. For example: If I capture a workload with 18 LUNs 200GB, to replay I need to have 18 LUNs with 200GB minimum. 2) I need to replay to more than one device. How can I do that with fio? Seems to me replay_redirect is for a single specified device. 3) Any help why I am getting that error? fio: ioengines.c:422: td_io_open_file: Assertion `!fio_file_open(f)' failed. Thank you very much for all help. All the best neto -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
