On 28/04/16 22:04, Simon Thompson (Research Computing - IT Services) wrote:
Ok, we are going to try this out and see if this makes a difference. The Windows server which is "faster" from Linux is running Server 2008R2, so I guess isn't doing encrypted SMB.
A quick poke in the Linux source code suggests that the CIFS encryption is handled with standard kernel crypto routines, but and here is the big but, whether you get any hardware acceleration is going to depend heavily on the CPU in the machine. Don't have the right CPU and you won't get it being done in hardware and the performance would I expect take a dive. I imagine it is like scp; making sure all your ducks are lined up and both server and client are doing hardware accelerated encryption is more complicated that it appears at first sight. Lots of lower end CPU's seem to be missing hardware accelerated encryption.
Anyway boot into Windows 7 and you get don't get encryption, connect to 2008R2 and you don't get encryption and it all looks better. A quick Google suggests encryption didn't hit till Windows 8 and Server 2012.
JAB. -- Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk Fife, United Kingdom. _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
