Latest XenApp XenDesktop bandwidth utilization tests


Is it just me, or does it seem like every few releases Citrix finds ways to further reduce bandwidth consumption. When 7.13 came out, there were statements saying bandwidth utilization dropped. And in 7.17, we are hearing similar remarks. If we look at the latest releases, we see the following major improvements to the ICA protocol 7.13: Introduce glyph detection/caching algorithm – Beneficial for text-based workloads Improve scroll detection 7.17: Update glyph detection/caching algorithm – Beneficial for text-based workloads 7.18: H.264 Build-to-Lossless – Beneficial for graphically interactive sessions Progressive Display – Beneficial for low bandwidth and/or high latency connections I … Continue reading Latest XenApp XenDesktop bandwidth utilization tests

Windows 2016 Bandwidth Estimates for XenApp


For 10 months in the cold north, we are addicted to winter weather forecasts (ok, 10 months is a little extreme. Winter does not usually last that long in Minnesota). But during winter, we always want to know how much snow we are going to get. The answer always comes down to ranges Less than 1 inch 1-2 inches 2-4 inches 3-5 inches 5-8 inches 6-10 inches 8-15 inches Head south As the totals get larger, the ranges get larger. There is so much room for error due to many variables. The same thing can be said for estimating network … Continue reading Windows 2016 Bandwidth Estimates for XenApp

Windows 10 Bandwidth Estimates for XenDesktop


How much bandwidth do I need between my endpoint and a Windows 10 virtual desktop? Note: Windows 2016 Bandwidth for XenApp on this blog It depends on the apps, on the usage, on the user and on the XenDesktop version. But “It Depends” isn’t a very good answer. Most of us who ask this question want a rough estimate, which is why I broke the bandwidth estimate down into 3 categories VDA Version: Certain releases of XenDesktop make improvements to the network utilization.  Bandwidth tests must account for these changes by looking at different VDA versions. Policy: XenDesktop policies can … Continue reading Windows 10 Bandwidth Estimates for XenDesktop

Virtual Desktop Bandwidth – Revisited


Back in May 2010, I started my Top 10 Mistakes Made with Virtual Desktops. I talked about how much bandwidth certain activities require when using XenDesktop and HDX. The table I provided is great, but it does pose the question, “What does a person do with this information?” Since then, I’ve been able to spend more time and have recently completed the bandwidth planning guide, which you can get by accessing the XenDesktop Design Handbook. But let’s take a closer look at what the planning guide says… First, we have a list of bandwidth requirements for certain activities (Office work, … Continue reading Virtual Desktop Bandwidth – Revisited

The Virtual School Is In Session, Please Take your Seats


Once upon a time, there was a little school (70,000 users) with a  little problem (desktops over 5 years old) with a little idea. The school was trying to find a way to make the tax money go further. The newest desktops were 5 years old with many more approaching 10 years.  Depending on the school within the district meant different endpoints, different applications and even different quality.  With so many students having home PCs, the school was also interested in allowing these students to work with their applications while not at school.

The school decided to try something new… desktop virtualization.

But if you had to create a desktop virtualization design for a school or your organization, how would you begin? What would you focus on?  What do you think are the most important design components?  That is what we will focus on during a Ask the Architect TechTalk on June 18th at 1PM Eastern time.  Not only will we focus on the hypevisor, which is Microsoft Hyper-V, we will also focus on the three Citrix FlexCast models used, the image delivery solution, applications integration and how the XenDesktop farm is designed.

There will be many interesting points throughout the TechTalk including this one: Continue reading “The Virtual School Is In Session, Please Take your Seats”

How Much Bandwidth Do I Need for My Virtual Desktop


Do you ever wonder how much bandwidth you need to do a desktop virtualization implementation? Regardless of the flavor of virtual desktop being implemented (hosted shared, hosted VM-based VDI, local streamed, etc), the network plays a critical role. That should not be surprising (if it is, we need to have an even bigger discussion). If you don’t plan your network bandwidth appropriately, you will have unhappy users, who will make you unhappy.

As we would expect, the user experience degrades as the latency increases and the bandwidth decreases. Proper network planning must be based on the type of work users are performing and the overall network topology. Back in the XenApp-only days, many people used 20 kbps as an estimate for network bandwidth requirements. Can we use that for virtual desktops? NO (although I could configure XenDesktop to only use 20 kbps).
Continue reading “How Much Bandwidth Do I Need for My Virtual Desktop”