Hi, i discovered that fio is able to replay captured blktrace patterns and just tried it ... without luck. It seems that fio can only replay the blktrace to the device that the trace was captured on? I did a blktrace on one of my servers which uses /dev/md1 as its main device and tried replaying the patterns on another server where i prepared a spare device (/dev/sdc). I'm running fio like this: # fio --name=replay --filename=/dev/sdc --read_iolog=trace_input_fio and it aborts with fio: filesetup.c:855: get_file: Assertion `fio_file_open(f)' failed. I also enabled --debug=all and noticed that while parsing the blktrace fio adds /dev/md1 to it's list of devices. The system i'm running fio on also has a /dev/md1 but this is my root-device and i don't want fio to run the r/w benchmark there. Is this a bug or would it be possible to modify fio so "--filename" overrides the device in captured trace? - Sebastian -- 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
