On Mon, Apr 07, 2008 at 10:24:56PM +0300, Pasi Kärkkäinen wrote:
> 
> Hello list!
> 
> I have lvm volume (from a single sata disk) exported with IET like this:
> 
> Target iqn.2001-04.com.test:vol1
>       Lun 0 Path=/dev/vg1/test1,Type=fileio
>       InitialR2T              No
>       ImmediateData           Yes
> 
> I have not modified read-ahead or other disk settings on the target server.
> target is using deadline elevator/scheduler.
> 
> open-iscsi initiator (CentOS 5.1 2.6.18-53.1.14.el5PAE and the default
> open-iscsi that comes with the distro) sees that volume as /dev/sda.
> 
> I'm testing performance with different read-ahead settings on the initiator.
> 
> Can somebody explain why I see these throughput changes? 
> 

Do other people see the same behaviour? if not then i guess the problem (or
a feature?) is in my target..

Or is there anything in open-iscsi that could explain this?

-- Pasi

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