I noticed when I am using --sync=1, IOPS go down to 15K and throughput to 53MB (That¹s horrible for the HW I am using), removing --sync I got 150K IOPS and almost 800MB, which make more sense. What does --sync does, and hope what I am doing should be enough to avoid any kind of memory caching.. Regards H. N. Harake fio --name=job --directory=/lvm --size=1G --iodepth=1 --sync=1 --filesize=1G --direct=1 --numjobs=64 --bs=4096 --rw=randwrite --group_reporting On 3/15/11 9:27 AM, "N. Harake" <hussein@xxxxxxx> wrote: > >I would like to disable completely the caching in memory, trying to >measure real throughput read/write and iops on filesystem (not raw >access). >Other than direct=1 is there any flag I could use to obtain such complete >bypass caching? > >Regards >H. N. Harake >-- >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 -- 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
