iscsi_initiator 2.2.2 slow to write and read

[Gary Palmer]

On Tue, Jul 07, 2009 at 07:05:03PM +0800, Jiansong Liu wrote:
> Hello All,
> 
> I downloaded the latest iscsi_initiator 2.2.2 from Danny's FTP,
> and compile kernel and iscontrol with 7.2 STABLE GENERIC config, only got
> about 800KB/Sec speed to a DELL MD3000i disk array, I searched in
> this malling list and found a patch, but it seems is not for this version
> (2.2.2), any advice would be great appreciated.
> 
> here are some details about my system:
> 
> # sysctl net.iscsi
> net.iscsi.driver_version: 2.2.2
> net.iscsi.isid: ???DIB00
> net.iscsi.sessions: 1
> net.iscsi.0.targetname:
> iqn.1984-05.com.dell:powervault.md3000i.60024e80004e71a9000000004a011120
> net.iscsi.0.targeaddress: 192.168.4.182
> net.iscsi.0.stats: recv=594 sent=594 flags=0x0000039f pdus-alloc=16
> pdus-max=16 cws=426 cmd=157 exp=157 max=300 stat=159 itt=157
> net.iscsi.0.douio: 0
> net.iscsi.0.pid: 754
> 
> # cat /etc/iscsi.conf
> scpstorage01 {
>         initiatorname =iqn.2005-01.il.ac.huji.cs::static01.com
>         TargetName
>  =iqn.1984-05.com.dell:powervault.md3000i.60024e80004e71a9000000004a011120
>         TargetAddress =192.168.4.182:3260,1
>          tags =4
> }

I'm no expert, but if that "tags" line refers to SCSI tags then that
number is too small.  Try increasing it and see if that helps to
address the problem.

Regards,

Gary