Alireza, I use 2 hba (fscsi1 -> fabric1, fscsi2 -> fabric2). Each fabric is connect to 3 nodes. # lspath | grep hdisk6 Enabled hdisk6 fscsi1 Enabled hdisk6 fscsi1 Enabled hdisk6 fscsi3 Enabled hdisk6 fscsi3 Enabled hdisk6 fscsi1 Enabled hdisk6 fscsi3 # With : bs=256k and # cat randwrite.fio [global] thread numjobs=1 iodepth=1 group_reporting bs=256k norandommap=1 refill_buffers direct=1 ioengine=posixaio runtime=300 time_based filename=/dev/hdisk6 log_avg_msec=1000 [randread_32_256] rw=randread numjobs=32 iodepth=256 stonewall # IOPS: 23 000 Bandwith: 85 Mo/s Latency: 0.5 ms but with this one: # cat randwrite.fio [global] thread numjobs=1 iodepth=1 group_reporting bs=4k norandommap=1 refill_buffers direct=1 ioengine=posixaio runtime=300 time_based filename=/dev/hdisk6 log_avg_msec=1000 [randread_64_64] rw=randread numjobs=64 iodepth=64 stonewall # IOPS: 10 000 Bandwith: 40 MB/S Latency: 1.5 ms but write seems better than read: # cat randwrite.fio [global] thread numjobs=1 iodepth=1 group_reporting bs=4k norandommap=1 refill_buffers direct=1 ioengine=posixaio runtime=300 time_based filename=/dev/hdisk6 log_avg_msec=1000 [randwrite_64_64] rw=randwrite numjobs=64 iodepth=64 stonewall # IOPS: 42 000 Bandwith: 163 MB/S latency: 0.2 ms I don't understand why for last test randwrite is better than randread. I'm lost and don't undertand how to stress the LUN. Regards, Thierry -- 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
