Virtualization by Davis: “Tech: The Paravirtualization Spectrum” plus 6 more

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• Tech: The Paravirtualization Spectrum
• upgrading clients 4.6 clients to sp2
• Availabilty of App-V 5.0 RDS Client?
• Citrix Knowledge Center Top 10 – October 2012
• Technology Solutions to Avoid the Sandy Aftermath Commuting Nightmare
• Smartcard logon issue caused by USIM reader
• PVS and the forgotten antivirus exclusions

Tech: The Paravirtualization Spectrum Posted: 04 Nov 2012 11:27 PM PST On the official Xen.org Community blog George Dunlap, Senior Engineer at Citrix posted two articles explaining the different types of virtualization, from full virtualization to full paravirtualized virtualization. Dunlap explains what the terms Hardware Virtual Machine (HVM), Para Virtualized (PV), Para Virtualized Hardware Virtual Machine (PVHVM) and PV in a HVM container (PVH) mean and what the differences, advantages and disadvantages of each of them. With full virtualization the assumption in the early days was that the Virtual Machine (VM) was functionally identical to a real machine, meaning that it provided: Disk and network devices Interrupts and timers Emulated platform: motherboard, device buses, BIOS "Legacy" boot: i.e., starting in 16-bit mode and bootstrapping up to 64-bit mode Privileged instructions Pagetables (memory access) Later Intel and AMD introduced Hardware Virtual Machine (HVM), which provided hardware emulation, a set of extensions that make it easier to virtualize the processor. Other components though still needed to be virtualized. Full paravirtualized VMs run with fully paravirtualized disk and network interfaces; interrupts and timers are paravirtualized; there is no emulated motherboard or device bus; guests boot directly into the kernel in the mode the kernel wishes to run in (32-bit or 64-bit), without needing to start in 16-bit mode or go through a BIOS; all privileged instructions are replaced with paravirtualized equivalents (hypercalls), and access to the page tables was paravirtualized as well. Currently there are many solutions which partially are virtualized and other parts are paravirtualized, see figure below. The articles can be found here: The Paravirtualization Spectrum, part 1: The Ends of the Spectrum The Paravirtualization Spectrum, Part 2: From poles to a spectrum Labels: Tech, virtualization

upgrading clients 4.6 clients to sp2 Posted: 04 Nov 2012 09:05 PM PST Has anyone upgraded there server to 4.6sp2?  Should I do a backup before, or should I just got for it?  Once my server is upgraded I then can push the upgrade of my clients with SCCM, no problems there correct?  I am in a appv standalone mode. Thanks, Jason This posting includes an audio/video/photo media file: Download Now

Availabilty of App-V 5.0 RDS Client? Posted: 04 Nov 2012 07:24 PM PST OK I got my hands on the new MDOP 2012 which has App-V 5.0 but the Remote Desktop Services client seems to be missing. Anyone know where I can download it? This posting includes an audio/video/photo media file: Download Now

Citrix Knowledge Center Top 10 – October 2012 Posted: 04 Nov 2012 06:44 PM PST Citrix Support is focused on ensuring Customer and Partner satisfaction with our products. One of our initiatives is to increase the ability of our Partners and Customers to leverage self-service avenues via our Knowledge Center. Find below the Citrix Knowledge Center Top 10 for October 2012.   Top 10 Technical Articles Article Number Article Title CTX129229 Recommended Citrix and Microsoft Hotfixes for XenApp 6 and… Read More

Technology Solutions to Avoid the Sandy Aftermath Commuting Nightmare Posted: 04 Nov 2012 04:58 PM PST If you are one of the millions in the North East lucky enough to escape the worst of Sandy but now need to get back to work, gassing up for a long commute is not the most productive way to catch up. Many employees already have email as a primary remote connection to work however that only gets so far. Most need access to apps… Read More

Smartcard logon issue caused by USIM reader Posted: 04 Nov 2012 03:10 PM PST Created: 2012-04-12 Updated: 2012-04-12 Background: When launching an application hosted on a XenApp (4.0/4.5/6.0/6.5) server from a Dell Latitude E6320 with a build in USIM reader, you will generally get an error (see below). The message itself mainly causes functional issues on Windows 2003 servers, but is visible on all operating systems. In reality this causes mainly issues when connecting a newer laptop to a… Read More

PVS and the forgotten antivirus exclusions Posted: 04 Nov 2012 02:16 PM PST Created: 2012-11-04 Last Updated: 2012-11-04 During most of my Provisioning services engagements I found that most implementations lack the correct antivirus exclusions for optimal stability. Unfortunately it happens more often than one would expect and I have therefore decided to document the once that most people are missing. It should be noted that there are some different file names for various OS, and that some… Read More

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