Understanding Thin Clients for Citrix – Just Got A Whole Lot Easier!

CRHDXUpdate (5th/Jan/2016): Sagnik who ran this project has now published a comprehensive overview of the official information available from Citrix, including some tips on using the new database and enhanced search functionality – essential reading – click here.

I’ve recently left Citrix and was pleased to see some of the projects that I worked on as Linux Receiver Product Manager come to fruition which have been a long time in the making. The Linux Receiver is quite different to many of the Citrix Receivers in that: Continue reading “Understanding Thin Clients for Citrix – Just Got A Whole Lot Easier!”

Why CAD users really care about hidden-line and what you need to know about it to test remote graphics!

In a past life I was a kernel engineer on Parasolid the numerical heart within many top CAD applications such Ansys Workbench, Dassault Solidworks, Siemens NX and Solid Edge, Bentley, Nemetscheck, Missler Top Solid; I lived, breathed and obsessed about CAD workflows, how users construct parts and use CAD applications. Now I’m in Cloud computing and VDI, I still get to work with CAD applications but am working in an industry where for many other than the customer – a CAD application is just another VDI or virtualised app or workload.

Continue reading “Why CAD users really care about hidden-line and what you need to know about it to test remote graphics!”

H.264 Alone is Not Enough! Plus Why Cloudbridge REALLY Matters!

H.264 is a limited technology, where delta frames are transmitted per user, this means only changes are transmitted so on a single session it’s low on bandwidth but does require CPU or GPU resource to work out the changes between frames. CPU and GPU invariably also means power and on mobile devices that means your battery power.

H.264 is also fundamentally weakest on data users really care about such as text and hidden-line/wireframe data in CAD applications, it’s fundamentally a now quite old codec designed for static video compression (read more here and here). Continue reading “H.264 Alone is Not Enough! Plus Why Cloudbridge REALLY Matters!”

Comparing Apples to Pears! Benchmarking Thinwire Compatibility and Other HDX Graphics Modes

applesOne of our really experienced experts has just done a blog on some evaluation he did on Citrix’s hot new graphics mode: http://trentent.blogspot.ca/2015/09/performance-differences-in-citrix-hdx.html. Now this guy knows what he is doing but I’m a little worried others might not fully understand what has been done or the implications for the results. Trent did some tests flipping the encoder via a registry key. We do not encourage users to play with registry keys, occasionally they can prove useful to tweak a system, but really if that is being done we should be exposing the control via properly documented policies.

Continue reading “Comparing Apples to Pears! Benchmarking Thinwire Compatibility and Other HDX Graphics Modes”

When less is more! Avoiding excessive web content!… I hate hi-res stock photography!

Last week I had a twitter user make comment that implied the reason some of our recent thinwire enhancements have happened is because some of the HDX development and product management team are in the UK! Stefan made this comment

goodhdx

After seeing a fellow tweeter struggling to get a decent mobile signal in central London, supposedly one of the world’s most developed cities! Continue reading “When less is more! Avoiding excessive web content!… I hate hi-res stock photography!”

Testing Graphics Protocols – Try Chinese Text – With the aid of some ropey pseudo-maths!

In HDX we use a variety of compression and text recognition algorithms to ensure bandwidth is used efficiently but also that screen elements like text or CAD wireframe/hidden-line are clear and sharp. When testing graphics protocols, we often try to ensure that we don’t just look at the average or mass usage case (in the case of a product like XenDesktop that’s often test workloads like Microsoft Office on windows laptops as the end points). We also look at those use cases which are most challenging e.g. using very old and low-powered Linux thin-clients as end-points because if we can get performance and quality in such scenarios the user experience is better for all our users.

In the case of text quality, we often look at non-English fonts Continue reading “Testing Graphics Protocols – Try Chinese Text – With the aid of some ropey pseudo-maths!”

HDX: Enhanced Support for 3D and CAD Cursors with Citrix XenDesktop/XenApp 7.6 FP3

Citrix XenDesktop/XenApp 7.6 FP3 has introduced enhanced architecture to support both 24-bit and 32-bit advanced cursors. Historically remoting protocols have supported simpler cursors but with an increase in the use of complex and larger cursors for complex CAD and 3D applications, Citrix has introduced a new architecture to support such cursors on-going.

Continue reading “HDX: Enhanced Support for 3D and CAD Cursors with Citrix XenDesktop/XenApp 7.6 FP3”

Why isn’t my GPU being used with Citrix XenDesktop or XenApp?

I don’t know…..I’m not psychic ;-)! It’s a question that occasionally comes up so I’ve put together a trouble-shooting guide, available here:

  • CTX202149 – Known Issues or Configuration Reasons: OpenGL/DirectX/GPU Acceleration Not Used

I’ve included:

  • Links to tools to identify the issue
  • Known common configuration errors
  • Known issues with GPU drivers
  • Information on applications and Operating Systems that turn GPU-acceleration off by default.

You should always consult the CTX article as it is likely I will add to it in the future, but here is what I published today! Please do add any other issues you find to this blog comments and also let me know if you came across one of the issues (and which one), so I can work out whether writing lots of CTX articles is indeed a good use of my time! 😀

Continue reading “Why isn’t my GPU being used with Citrix XenDesktop or XenApp?”

Find Monitoring Products for Citrix XenApp and XenDesktop – part 2….. An enormous list!!!

Some weeks ago I published this post, listing a few of the monitoring products I saw used by XenApp/XenDesktop sys admins. It was an off-the-top-of my head list, completely uncomprehensive! Since then though I’ve had a number of people send me their recommendations and lists of similar products! The lists from a few have been vast and included many products I’ve never heard of! As such I can’t possible review them or vouch for them but for those looking to evaluate monitoring products it may be useful if they are willing to do their own due diligence!

Continue reading “Find Monitoring Products for Citrix XenApp and XenDesktop – part 2….. An enormous list!!!”

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