Use ifconfig to check the MTU on your eth device If it is bigger than 1500 than u use jumbo. You will need to check on the switch as well. Make sure all the MTU's in your path are the same. You can also check the mss (MTU-headers)
-----Original Message----- From: open-iscsi@googlegroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Miguel Gonzalez Casta?os Sent: Wednesday, January 09, 2008 1:07 PM To: open-iscsi@googlegroups.com Subject: Re: Performance of open-iscsi over TCP > 10 MB/sec sounds really poor. > > What kind of disk performance do you get locally on the target/server > from the SATA RAID array? You can try iometer or some other disk benchmarking tools. > I've downloaded iometer, can you tell me what do I have to test and how? > What kind of latency (ping roundtrip with 4k packets) do you have from > the initiator to the target? latency is one of the key factors > limiting IOPS you will get. > ping -s 4048 10.0.6.41 4056 bytes from 10.0.6.41: icmp_seq=179 ttl=128 time=0.795 ms --- 10.0.6.41 ping statistics --- 179 packets transmitted, 178 received, 0% packet loss, time 178261ms rtt min/avg/max/mdev = 0.789/1.429/1.990/0.534 ms > How's your network between the target and initiator? gigabit? jumbo frames? > flow control? what kind of switch are you using? > gigabit in both ends. The switch I'm not in front of the machine so I can't tell you until next week but my guess is that's a regular switch. I think that I'm going to try a crossover cable of CAT 6 to avoid any other issue. I think jumbo frames are deactivated but how can I know? > How's the performance with FTP/HTTP/CIFS between the target and the > initiator? > It is the same as mentioned before: 10 MB/s Miguel --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
