FUJITA Tomonori schrieb: > On Mon, 26 Nov 2007 12:25:19 +0100 > Albert Pauw <[EMAIL PROTECTED]> wrote: > >> 2007/11/26-12:24:19 | STAT | 3237 | v1.2.8 | /dev/sdb | Total read >> throughput: 827938.1B/s (0.79MB/s), IOPS 25.3/s. >> >> The patch didn't make a difference, sorry. > > The performances in the configuration don't matter much, but I just > run initiator and target on the same machine: > > sens:/home/fujita# hdparm -t /dev/sdd > > /dev/sdd: > Timing buffered disk reads: 20 MB in 3.15 seconds = 6.35 MB/sec
(...) > sens:/home/fujita# hdparm -t /dev/sdd > > /dev/sdd: > Timing buffered disk reads: 410 MB in 3.02 seconds = 135.55 MB/sec > > > Seems that haparm isn't an appropriate tool to meature performance but > not bad performances. It is appropriate, when used appropriately. If a block device is used (mounted, swap, md/dm etc.) it is also cached. One should always clear the cache if wants to measure performance (on the target, on the initiator, or both, depending on where the block device is used; to be 100% sure, clear the cache on both target and initiator before each test): echo 3 > /proc/sys/vm/drop_caches -- Tomasz Chmielewski http://wpkg.org _______________________________________________ Stgt-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/stgt-devel
