Re: Performance of open-iscsi over TCP

2008-01-09 Thread Pasi Kärkkäinen
On Tue, Jan 08, 2008 at 07:37:14PM -0500, Miguel Gonzalez Castaños wrote: > > Erez Zilber escribió: > > Hi, > > > > I'm running some performance tests with open-iscsi (iops & throughput). > > With open-iscsi over TCP, I see very low numbers: > > > > * iops: READ - 2, WRITE - 13000 > >

RE: Performance of open-iscsi over TCP

2008-01-09 Thread Sagi Rotem
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 [mai

Re: Performance of open-iscsi over TCP

2008-01-09 Thread Miguel Gonzalez Castaños
> 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

Re: Performance of open-iscsi over TCP

2008-01-09 Thread Pasi Kärkkäinen
On Wed, Jan 09, 2008 at 06:07:10AM -0500, Miguel Gonzalez Castaños wrote: > > > > 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'

Re: Performance of open-iscsi over TCP

2008-01-09 Thread Miguel Gonzalez Castaños
> > Well, this is your problem. Fix it first. > > If you can't get better throughput with FTP/HTTP/CIFS, how could you with > iSCSI? > > Sounds like you're running at 100 Mbit/sec. > I'm researching on this matter. I have tested from the machine where Virtual Server is running using hrping:

Re: Performance of open-iscsi over TCP

2008-01-09 Thread Pasi Kärkkäinen
On Wed, Jan 09, 2008 at 11:13:26AM -0500, Miguel Gonzalez Castaños wrote: > > > > > > Well, this is your problem. Fix it first. > > > > If you can't get better throughput with FTP/HTTP/CIFS, how could you with > > iSCSI? > > > > Sounds like you're running at 100 Mbit/sec. > > > I'm researchi