I've tried nearly all of the leading remote desktop technologies that I could find.
Remote Video is hard to improve on any of them without taking a different approach that frame buffer forwarding.
So NoMachine's NX, Citrix's remote desktop technology etc all are limited by bandwidth constraints of trying to push full motion video frame buffers across a WAN link.. no matter how good the compression. Which by the way also affects video quality because of delay.
There are solutions out there that are trying to address this in a different architectural way such as the Spice client & server architecture which does the video processing at the client and more or less sends gui control cmds over the net.
There is also PCoIP (PC over IP) which works very well at full motion video and also 3D video BUT it requires hardware installed at the server side and also a PCoIP card at the Client side... so its not cheap.
I think there are 2 other things that should impact the performance current NX related solutions:
I recently read that several NX solution vendors are now using *libjpeg-turbo *instead of the older libjpeg.
*http://libjpeg-turbo.virtualgl.org/*
- It's a high-speed version of libjpeg based on libjpeg/SIMD but with additional optimizations and support for 64-bit platforms (and neatly*
- packaged into an SDK that can install on most types of x86/x86-64 systems.) It's 2-4x faster than libjpeg and GPL-compatible, so I would*
- imagine that NX related remote desktop solutions like x2go, FreeNX and NX from NoMachine itself woul all benefit from it performance-wise.*
*NOTE: when I first tried libjpeg-turbo I installed it only on the client and I didn't seem much if any change. However I recently learned that actually has to be innstalled on BOTH server and client to see the performance benefit but in a recent test I saw the results of increased performance 180%. BUT - I'd still recommend running Browser based video like YouTube off of the local Client machine instead of over the Internet from a remote desktop.
*2) HTML 5 with its enhanced support for multimedia (video & audio)*
Brian
Am Mittwoch, den 22.09.2010, 21:56 -0600 schrieb Dimitris Anogiatis:
Dear List,
Does anyone know of any advantages from installing a hardware ssh (or crypto) accelleration device on a server machine running x2go? For example I've tried to tweak my SSH server but despite some improvements in responsiveness video playback (I tried a youtube video) is still choppy.
Would a device like that help or does x2go's design not allow it to benefit from such an enhancement?
I'm using my x2go client from a remote location using wifi and not in a LAN.
Regards, Dimitris
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