Re: [Iscsitarget-devel] write performance examples ?

[Ming Z. <mi...@el...>]

what is u target storage? disk or raid? thx


On Wed, 2006-03-29 at 16:48 -0800, Gerard J. Cerchio wrote:
> I got an extra 6.7%. I went from 29.5MB/sec to 31.5MB/sec. This is
> writing to a raw partition on the iSCSI target. When I write to the
> NTFS file system on the iSCSI target I get about 30.2MB/sec.
> 
> Here is what I did to Linux:
> 
>    echo "1" > /proc/sys/net/ipv4/tcp_window_scaling
>    echo "1" > /proc/sys/net/ipv4/tcp_timestamps
>    echo [wmax] > /proc/sys/net/core/rmem_max
>    echo [wmax] > /proc/sys/net/core/wmem_max
>    echo [wmax] > /proc/sys/net/core/rmem_default
>    echo [wmax] > /proc/sys/net/core/wmem_default
>    echo "[wmin] [wstd] [wmax]" > /proc/sys/net/ipv4/tcp_rmem
>    echo "[wmin] [wstd] [wmax]" > /proc/sys/net/ipv4/tcp_wmem
>    echo "bmin bdef bmax" > /proc/sys/net/ipv4/tcp_mem
>    ifconfig eth1 txqueuelen 1000
> 
> here is what I did to ietd.conf
> 
>    InitialR2T              No
>    ImmediateData           Yes
>    xMaxRecvDataSegmentLength 262144
> 
> I am transferring 1MB data objects to the raw unformatted volume.
> 
> I hope this answers your question
> 
>