Hi All, This is neto from Brazil How are you? I am doing a performance POC and I need to simulate 100% true random workload. I am using Fibre Channel and Windows 2008R2. I have 8 LUNs (125GB each) and my configuration file is: [workload] bs=8k ioengine=windowsaio iodepth=3 numjobs=35 direct=1 runtime=120 size=1024g filename=\\.\PhysicalDrive1 filename=\\.\PhysicalDrive2 filename=\\.\PhysicalDrive3 filename=\\.\PhysicalDrive4 filename=\\.\PhysicalDrive5 filename=\\.\PhysicalDrive6 filename=\\.\PhysicalDrive7 filename=\\.\PhysicalDrive8 zonesize=1024m zoneskip=3g rw=randrw rwmixread=80 rwmixwrite=20 thread unified_rw_reporting=1 group_reporting=1 randrepeat=0 norandommap Questions: 1) I am assuming the working set is the size parameter that is 1TB. Is that correct? 2) What is the correlaction of the zonesize and zoneskip with the randomness? Adding those will help with the randomness of the workload or not? 3) If I use zonesize=1024m and zoneskip=3g I have like 100K IOPS (coming from cache not disks) and if I use zonesize=10g and zoneskip=26g I have more realistic numbers. Could someone explain which is the a good example to use zonesize and zoneskip? 4) Is it possible with fio to specify per disk randomness area: For example: disk1 - start blocks 456 till blocks 3456, disk2 - start blocks 4567 to 103456 Thank you very much All the best neto -- 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
