From: Ming Z. <mi...@el...> - 2006-03-16 21:39:43
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u client is windows. :P try a linux client and u should see quite different results. during u pure write io, also run iostat. see if there are still many read happen. also in kernel fileio.c try change filp = filp_open(path, O_RDWR|O_LARGEFILE, 0); to filp = filp_open(path, O_RDWR|O_DIRECT|O_LARGEFILE, 0); and see what happen. ming On Thu, 2006-03-16 at 22:24 +0100, Brian Simonsen wrote: > Hi > > I have been searching through the mailing list and i see that a lot off > people find that write performance is no better than 1-4 MB/s in simple > tests just copying from the initiator to the target. This is the same > results that i am getting on a simple setup over Gb ethernet. I am sure > that the the wire is not the bottleneck and reads from the target are > OK. (30-40 MB/s). > > I am just wondering if anybody has seen good write performance? at least > enough throughput to saturate a fast ethernet connection. I know that > iet only does writethrough, but this should'nt account for the 2-4 MB/s > speeds i am seeing. I am writing to a setup with 4 sata disks in a > hardware RAID5 (cerc controller in a dell powervault). > > regards > > Brian > > > ------------------------------------------------------- > This SF.Net email is sponsored by xPML, a groundbreaking scripting language > that extends applications into web and mobile media. Attend the live webcast > and join the prime developer group breaking into this new coding territory! > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 > _______________________________________________ > Iscsitarget-devel mailing list > Isc...@li... > https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel |