I'm trying to measure latency. Is this the right incantation for "8KB block write latency"? fio --name=test --numjobs=1 --bs=8k --rw=randwrite --sync=0 --direct=1 --iodepth=1 --ioengine=libaio --loops=1 --size=16091503001 --filename=/dev/sdb ... I figure I can only measure latency w/ just one thread and no outstanding I/O's. The results show two latency numbers: clat and slat... what are these? Thanks, Chris -- 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