Hello, I am trying to simulate bursty traffic with fo. I know that I can do this by tracing a bursty app and then doing a blktrace replay, but I would like to do something programatic. I had hoped that I could create an io_replay file that looks like this which would read, then pause for 100ms before issuing the next read. Once working I could then vary (lower) the "wait" period to generate the bursts. But what seems to happen is that all the "wait" lines are executed sequentially, followed by all the "reads" sequentially, without the 100ms pause in-between. FWIW, using blktrace input works as expected, and replays the trace at the same iO rate as the traced workload. [root@arches filebench]# /usr/local/bin/fio --version fio-3.13 [root@arches filebench]# /usr/local/bin/fio --name=replay --read_iolog=read100.csv [gary@arches filebench]$ cat read100.csv fio version 2 iolog /dev/sdc add /dev/sdc open /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc read 16384 4096 /dev/sdc wait 100000 1 /dev/sdc close
