copy offload for SMB?

[David Disseldorp]

On Fri, 22 Feb 2013 02:40:09 +0000
"Liujun (A)" <liujun09 at huawei.com> wrote:

> I have wrote a test to test offload feature,  the is result is that Windows server 2012  does not support offload read (FSCTL_OFFLOAD_READ).

For the record, I think Windows Server 2k12 support for the new
FSCTL_OFFLOAD_READ/WRITE SMBs is dependent on the underlying storage
subsystem.
It requires an advanced (expensive) storage array that handles
POPULATE_TOKEN and WRITE_USING_TOKEN SCSI commands. See
www.snia.org/sites/default/files2/SDC2011/presentations/monday/NealChristiansen_Win8FileSystemPerformance.pdf

Cheers, David