[PATCHES] SMB3 Multi-Channel: connection passing and enablement

Michael Adam obnox at samba.org
Wed Feb 10 07:05:13 UTC 2016

On 2016-02-01 at 17:58 +0000, Youzhong Yang wrote:
> Hi Michael,

Hi Youzhong Yang,

Thanks for testing the feature and for your feed-back!

> I applied your patch smb3-mc-enable.patch to the master branch,
> successfully built a samba version on our SmartOS box and
> tested it. It works! I can see network traffic goes through two
> vNIC interfaces.
> What I did is copying six 4GB files from the server to a
> Windows 10 host with two physical NICs (Intel(R) 82574L
> Gigabit). Each interface was transferring ~120M bytes per
> second, which is almost its line speed, for approximately 30
> seconds. After 30 seconds, the speed dropped to ~30M
> bytes/second. Please see attached nic stats file for your
> reference.
> I cannot explain this behavior. I am just wondering if it is
> related to Windows 10 network throttling or something like
> that, but I couldn't find a knob to turn it off.

Does the throttling only happen with multi-channel enabled
or also without it?

Could well be that some buffers are filled on the
Windows/receiving side and a disk is becoming a

What happens if you write to Samba instead of reading
from it?

What happens if you write to a ramdisk?

Just some thoughts.


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