Here is the dd command : time dd if=/dev/zero bs=1024k of=/mnt/iscsi/ 10gfile.txt count=10240
Here are the cpu values : Cpu(s): 0.0%us, 8.7%sy, 0.0%ni, 25.0%id, 64.0%wa, 0.4%hi, 1.9%si, 0.0%st -> Client Cpu(s): 0.6%us, 2.8%sy, 0.0%ni, 86.4%id, 9.7%wa, 0.0%hi, 0.4%si, 0.0%st -> SAN I have not tried the nullio LUN from the target... I'm not sure how to go about this ...? Thank you for your help. On Nov 25, 5:04 am, Pasi Kärkkäinen <pa...@iki.fi> wrote: > On Tue, Nov 24, 2009 at 08:07:12AM -0800, Chris K. wrote: > > Hello, > > I'm writing in regards to the performance with open-iscsi on a > > 10gbe network. On your website you posted performance results > > indicating you reached read and write speeds of 450 MegaBytes per > > second. > > > In our environment we use Myricom dual channel 10gbe network cards on > > a gentoo linux system connected via fiber to a 10gbe interfaced SAN > > with a raid 0 volume mounted with 4 15000rpm SAS drives. > > Unfortunately, the maximum speed we are acheiving is 94 MB/s. We do > > know that the network interfaces can stream data at 822MB/s (results > > obtained with netperf). we know that local read performance on the > > disks is 480MB/s. When using netcat or direct tcp/ip connection we get > > speeds in this range, however when we connect a volume via the iscsi > > protocol using the open-iscsi initiator we drop to 94MB/s(best result. > > Obtained with bonnie++ and dd). > > What block size are you using with dd? > Try: dd if=/dev/foo of=/dev/null bs=1024k count=32768 > > How's the CPU usage on both the target and the initiator when you run > that? Is there iowait? > > Did you try with nullio LUN from the target? > > -- Pasi -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-is...@googlegroups.com. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
