LOL. I think we're pushing our luck here... ... but we won't rat you out if you tell us anything. ;-)
On Mon, Mar 30, 2009 at 7:55 PM, David Markey <[email protected]> wrote: > Great news. > > Care to divulge if any improvements will be in the next release, and in > fact when the next release will be(i've drugged the guys in suits and > glasses)? > > > Regards. > > > > > > > Michael Bender wrote: > > > > On Mar 30, 2009, at 12:43 PM, David Markey wrote: > > > >> Are any improvements are in the pipeline as far as the USB subsystem is > >> concerned that would improve performance at all > > > > Yes. > > > >> and can any tweaking be done in meantime? > > > > No. > > > > And that's all that I can say at the moment since I hear the guys in > > the black suits and dark glasses walking up my stairs since I've said > > too much already ;-) > > > > Seriously, we are looking at ways to improve performance of specific > > classes of USB devices and the USB subsystem overall. > > > > mike > > > > ---- > > > >> Regards, > >> > >> David. > >> > >> > >> > >> > >> > >> > >> Bob Doolittle wrote: > >>> The reason for slow USB performance on Sun Ray is that, in order to > >>> remove the need for multiple custom firmware drivers, the USB protocol > >>> is expressed directly over the network between client and server > >>> (except for keyboard and mouse which are handled in firmware). It's > >>> the server that processes the "raw" USB stream. USB protocol is > >>> defined for an extremely low-latency bus, and as such has very small > >>> maximum transfer sizes, and the protocol is synchronous. When > >>> translated to a higher-latency bus like ethernet, the overall > >>> throughput is greatly reduced by the inter-packet latencies. > >>> > >>> -Bob > >>> > >>> David Markey wrote: > >>>> Ok it seems that using samba doesn't make a difference when copying > >>>> off > >>>> a USB key mounted on the server. It took 26 minutes via samba and > >>>> about > >>>> the same via RDP redirection to copy a 330MB file from my USB key. > >>>> > >>>> The biggest bottleneck lies somewhere between the DTU and the SunRay > >>>> server, or I heard that the pcfs implementation on Solaris has issues > >>>> aswell. > >>>> > >>>> > >>>> It's really quite strange that the USB throughput over a 100mbit > >>>> pipe is > >>>> as low as ~12MB/min, I did a quick test and i was getting 11.21MB/s > >>>> over > >>>> FTP to the sunray server(from the same location that my DTU is) so i'm > >>>> ruling out a slow network. > >>>> > >>>> Does everyone else routinely experience USB performance similar to > >>>> this? > >>>> > >>>> Thanks. > >>>> > >>>> David > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> David Markey wrote: > >>>> > >>>>> Not really, But i did do the samba test 1st so in theory RDP had the > >>>>> advantage by having the file buffered for the 2nd test? > >>>>> > >>>>> > >>>>> > >>>>> John Francis wrote: > >>>>> > >>>>>> 2009/3/28 David Markey <[email protected]>: > >>>>>> > >>>>>>> It took 7 seconds via samba to copy the file and 29 seconds via > >>>>>>> RDP. > >>>>>>> > >>>>>> Did you take into account file system buffers? For example, before > >>>>>> running either test did you do a "cat myfile > /dev/null" to make > >>>>>> sure > >>>>>> it was likely pre-loaded into RAM? > >>>>>> > >>>>>> > >>>>> _______________________________________________ > >>>>> SunRay-Users mailing list > >>>>> [email protected] > >>>>> http://www.filibeto.org/mailman/listinfo/sunray-users > >>>>> > >>>> > >>>> _______________________________________________ > >>>> SunRay-Users mailing list > >>>> [email protected] > >>>> http://www.filibeto.org/mailman/listinfo/sunray-users > >>>> > >>> > >> > >> _______________________________________________ > >> SunRay-Users mailing list > >> [email protected] > >> http://www.filibeto.org/mailman/listinfo/sunray-users > > > > _______________________________________________ > > SunRay-Users mailing list > > [email protected] > > http://www.filibeto.org/mailman/listinfo/sunray-users > > _______________________________________________ > SunRay-Users mailing list > [email protected] > http://www.filibeto.org/mailman/listinfo/sunray-users >
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