hi all, I am using FIO (2.1.7) to profile block level performance of multiple RAID devices. (see config file below). The test is done on a capable 16-core server. With a sigle raid device, I am getting roughly 1.4GB/s, with two devices in place, I am still getting around 1.4GB/s, which is weird. Another in-house developed benchmark tool, running SINGLE-thread suggested we can almost double. I could get double the performance through FIO by configuring two jobs, with each job handling one device only. However, it still puzzles me as to why a single process FIO can't drive the performance of two devices. Did I do anything wrong as to the configure file? Thanks Alex. [globals] rw=write ioengine=libaio iodepth=16 direct=1 blocksize=1m runtime=30 [devices] filename=/dev/mapper/raid-0 filename=/dev/mapper/raid-1 -- 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
