Re: openiscsi 10gbe network

2009-11-25 Thread Boaz Harrosh
On 11/24/2009 06:07 PM, 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

Re: openiscsi 10gbe network

2009-11-25 Thread Pasi Kärkkäinen
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 environme

Re: iSCSI latency issue

2009-11-25 Thread Vladislav Bolkhovitin
Shachar f, on 11/25/2009 07:57 PM wrote: > I'm running open-iscsi with scst on Broadcom 10Gig network and facing > write latency issues. > When using netperf over an idle network the latency for a single block > round trip transfer is 30 usec and with open-iscsi it is 90-100 usec. > > I see tha

Re: openiscsi 10gbe network

2009-11-25 Thread Chris K.
The dd command I am running is time dd if=/dev/zero bs=1024k of=/mnt/ iscsi/10gfile.txt count=10240 My fs is xfs (mkfs.xfs -d agcount=8 -l internal,size=128m -n size=8k - i size=2048 /dev/sdb1 -f) those are the parameters used to format the drive. Here are the top values: Cpu(s): 0.0%us, 6.1%sy,

iSCSI latency issue

2009-11-25 Thread Shachar f
I'm running open-iscsi with scst on Broadcom 10Gig network and facing write latency issues. When using netperf over an idle network the latency for a single block round trip transfer is 30 usec and with open-iscsi it is 90-100 usec. I see that Nagle (TCP_NODELAY) is disabled when openning socket o

Re: openiscsi 10gbe network

2009-11-25 Thread Chris K.
Thank you for your response. The SAN is a 10gbe Nimbus with I believe to be iscsitarget(http://iscsitarget.sourceforge.net/) as it's target server. The switch is a Cisco Nexus5010 set to jumbo frame and flow control. We have through tcp/ip performance tests in conjunction with Cisco proved that thi

Re: openiscsi 10gbe network

2009-11-25 Thread Chris K.
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 h

Re: !!!!Help: Problem when I login the iscsi hard disk

2009-11-25 Thread Mike Christie
Ricky wrote: > sda: got wrong page You mean this right? The linux scsi layer was trying to figure out the cache type. It got an unexpected answer and so ... > sda: assuming drive cache: write through it used the default of write through cache. > sd 6:0:0:0: Attached scsi disk sda > sd 6:0:0:

Re: [Patch 1/2] iscsiadm: login_portal() misses outputting logs for iscsid_req_by_rec()

2009-11-25 Thread Mike Christie
Yangkook Kim wrote: > Thanks for your patch. > > I tested your patch and it worked fine. > > So, next you will upload this patch to the git tree > and the patch will become the part of source code > in the next release of open-iscsi. > > Is my understanding correct? Yeah. I merged it and uploa

Re: openiscsi 10gbe network

2009-11-25 Thread Mike Christie
Boaz Harrosh wrote: > On 11/24/2009 06:07 PM, 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

Re: !!!!Help: Problem when I login the iscsi hard disk

2009-11-25 Thread Ruiqiang FU
This information will also come out when I fdisk /dev/sda. And I can not mkfs this disk. I think the cache type should be write back. But I do not how to handle this situation. 2009/11/26 Mike Christie > Ricky wrote: > > sda: got wrong page > > You mean this right? The linux scsi layer was try

be2iscsi: don't set set_host_ip

2009-11-25 Thread Mike Christie
be2iscsi can store its ip address in firmware/flash so there is no need to have to set one in a iface. Just use whatever is in firmware/flash. -- 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...@googleg

Re: [Scst-devel] iSCSI latency issue

2009-11-25 Thread Bart Van Assche
On Wed, Nov 25, 2009 at 5:57 PM, Shachar f wrote: > I'm running open-iscsi with scst on Broadcom 10Gig network and facing write > latency issues. > When using netperf over an idle network the latency for a single block round > trip transfer is 30 usec and with open-iscsi it is 90-100 usec. > > I s

Re: openiscsi 10gbe network

2009-11-25 Thread Ulrich Windl
On 25 Nov 2009 at 14:15, Chris K. wrote: > 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, A note: I don't know how well open-iscsi uses multiple threads, but looking at individual CPUs may be interesting, as the above is only an average for multiple C