Hello I am running fio on the top of raw block device with following two configurations and I saw the first config (single threaded) can put more load on the underlying storage system compared to second config (with 4 thread). However, I expected to see the opposite side (more IO load with multiple job compared to single job). Does it make sense to you ? Is there any locking or handshaking between multiple jobs in the second config that reduce the IO injection rate of fio ? ; -- start job Config 1 file -- [global] rw=write size=5G [job1] ioengine=libaio iodepth=8192 bs=4k direct=1 numjobs=1 directory=/dev filename=sdp ; -- end job file -- ------------------------------------------------ ; -- start job Config 2 file -- [global] rw=write size=5G [job1] ioengine=libaio iodepth=8192 bs=4k direct=1 numjobs=4 directory=/dev filename=sdp ; -- end job file -- -- 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
