Citrix Receiver Versions

As a Citix consultant I spend the vast part of my day working with VDI in one form or another and on one device or another. I especially like my iPad, but I digress. Recently, I was tasked with looking at why some functionality worked for some people and it wasn't present for others. Everyone was supposed to be using the same version. However, discovery revealed that this was not the case and there were different versions. What are the versions?

VM Workstation 8

I've been using linux for years and it is my preference for my desktop and my home systems, however the companies I work with and for usually issue Windows desktops and most of the their applications are windows applications. So, I run windows when I have to, either by dual boot or in a VM. Currently, I'm working for a company that provides a windows laptop that I must us to connect to the corporate LAN via a VPN or I can use the Citrix Access Gateway from any computer.

2008 R2 Clustering with Storage Foundation for Windows.

I was recently tasked by an architect to build out several SQL clusters, the first of many with the following configuration:

  • Microsoft SQL Clusters
  • VMware RDMs and
  • Veritas (Symantec) Storage Foundation Windows (SFW).
  • Windows 2008 R2

The goal was to create HA clusters for virtualized SQL, and to allow us to dynamically allocate additional RDMs to the cluster as storage needs grew.

Hypervisors - Type 1 / Type 2

There is a lot of talk about the Cloud, but what really makes the whole cloud possible is the hypervisor. The hypervisor is what separates the "workload" from physical hardware. This is what allows us to move the workload around, from hardware to hardware. The hypervisor has been around since 1965 with IBM, but only recently has the adoption become exponential. And with the visibility of the Cloud and discussions about Virtual Desktop Initiatives/Infrastructure (VDI) there is now more emphasis on the hypervisor, and the "two types."

Citrix Architecture

The first thing about Citrix Architecture is to understand the ICA protocol. ICA is a presentation-layer protocol on the OSI-layer (6). ICA is a very thin protocol and is optimized for the WAN with high latencies, it works over SSL and is bandwidth optimized and supports QoS.

Since this is OSI-Layer 6, what does ICA do for optimization. The ICA packet contains the following headers: Frame Head, Reliable, Encryption, Compression, Command, Command Data, Frame Trail. The command is the only required information.

Optimizing Windows 2008 Server for Virtualization

I've written about optimizing Windows 7 and XP for VDI. Recently, I've been getting some questions about optimizing Windows Server. Since Windows 2008 R2 is the most current OS, this is what I'm going to focus on. Alot of the optimizations from Windows 7 can be used with 2008, these are more specific to the "server" OS.

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