[SunRay-Users] SunRay Citrix ICA Client Video and Audio Performance

CJ Keist cj.keist at colostate.edu
Mon Mar 21 16:13:58 EET 2011

      We used to use Citrix XenApp server to deliver whole Windows 
desktop to the Sun Rays.  We dropped that last year in favor of Sun Ray 
connector.  In our testing the Sun Ray connector performed better 
graphic and multi-media wise.  Plus it's a big saving not having to 
purchase all those Citrix licenses.  Now there are couple of big loses 
in dropping Citrix.  Cirtrix load balancing is better, but so far the 
Microsoft load balancing is working for us.  Next big lose was USB 
redirection.  The Sun Ray connect doesn't suport USB redirection in 
Window 2008 or up. That is of SRSS 4.2 which we are running.  Maybe some 
can comment whether USB redirection is working in the latest release of 

     The other fact with Citrix, is that it has to run a whole bunch of 
other crap processes with takes away resources from each of  your 
terminal servers, and ultimately the number of users you can put on each 
server.  With Sun Ray connector there are no other extra processes 
running on your terminal servers.

On 3/20/11 6:07 AM, Aaron Browne wrote:
> Hi,
> We are running our SunRay 2 and SunRay 3 units in kiosk mode which in 
> turn runs a Citrix ICA Client for our users.
> I would like to know if anyone else is running in this type of 
> configuration and if they can share any experience regarding video and 
> audio performance.
> Also, I am unsure if the SunRay multimedia redirection works with 
> Citrix or if it is exclusive to the RDP client?
> ++
> On our setup, video performance is limited to smaller resolution 
> videos and the audio can be choppy.
> YouTube is reasonable sometimes and occasionally audio doesn't work at 
> all.
> I have found that Windows Media Player destroys audio playback making 
> it crackly and annoying. Using a web Flash audio player results in 
> quite a good audio experience.
> Also, some tweaks to the ICA NumDataBuffers and NumCommandBuffers 
> options resulted in smoother video and audio for our users.
> Cheers,
> Aaron
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> SunRay-Users at filibeto.org
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C. J. Keist                     Email: cj.keist at colostate.edu
Systems Group Manager           Solaris 10 OS (SAI)
Engineering Network Services    Phone: 970-491-0630
College of Engineering, CSU     Fax:   970-491-5569
Ft. Collins, CO 80523-1301

All I want is a chance to prove 'Money can't buy happiness'

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