[stgt] 0.9.9.tgt ISCSI over 10G: performance issues to Windoh's initiator

FUJITA Tomonori fujita.tomonori at lab.ntt.co.jp
Sat Oct 17 16:08:56 CEST 2009

Sorry for the delay,

On Thu, 8 Oct 2009 13:20:11 -0600
Chris Worley <worleys at gmail.com> wrote:

> Running TGTD over 10G.
> Benchmarking with a Linux initiator, 1MB blocks, for example, gets
> 800MB/s reads, 600MB/s writes.
> Same target w/ a W2008S SP2 initiator (actually, the same machine as
> the Linux case, dual booted to its dark side), gets 800MB/s on the
> writes, but only a little better than 100MB/s on the reads.

Hmm, strange. The write performance could be bad because of the sector
alignment issue but I have no idea about bad read performances.

> Both cases are benchmarking the physical device, no file system or RAID.

What benchmark do you use? If I can reproduce it here, I might dig
into the problem.
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