2016-10-24 10:24 GMT-07:00 Tarek <cashew250@xxxxxxxxx>: > Matthew > > That is a good point, I typically do but had a bug in this latest > script that ran blkdiscard prior to any fio test. I will rerun and > report back. > > Thanks > There is whole documented devoted to performance testing and steps required to gather reliable data. http://www.snia.org/sites/default/files/SSS_PTS_Enterprise_v1.1.pdf I think since you are doing randread workload preconditioning shouldn't matter too much. It mostly matters for write operations. It seems like your workload fetches all the data from kind of cache. Maybe cache on SSD side. You can easily investigate it by reading the log pages. C1/C2 for Intel drives. See http://www.intel.com/content/www/us/en/solid-state-drives/ssd-dc-p3600-spec.html for details. Regards, Andrzej -- 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
