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Posts tagged Hyper-V Server 2008 R2
My fellow MVP Aidan Finn wrote it. I had the honor to be technical editor for it.
As Amazon promotes it:
The only book to take an in-depth look at deploying Hyper-V
Now in its second generation, the popular Hyper-V boasts technical advances that create even more dynamic systems than ever before. This unique resource serves an authoritative guide to deploying Windows Server 2008 R2 Hyper-V comprehensively. Step-by-step instructions demonstrate how to design a Hyper-V deployment, build a Hyper-V host environment, and design a management system with System Center Virtual Machine Manager 2008 R2.
Features real-world examples that show you how to design a Hyper-V deployment, build a Hyper-V host environment, and design a management system
Walks you through incorporating System Center Operations Manager 2008 R2, System Center Data Protection Manager 2010, and System Center Essentials 2010
Offers authoritative coverage of Hyper-V security, business continuity, and an array of VM roles, including domain controllers, Exchange Server, SQL Server, and System Center
This in-depth guide is the ultimate resource for system administrators, engineers, and architects, and IT consultants deploying Hyper-V.
You can order it from Amazon:
Or from Comcol.nl:
Extending certificate validity to avoid mouse/video refresh issues with the Hyper-V Virtual Machine Connection
Unfortunately, there is a bug in the annual certificate review process that can affect the refresh of mouse/video connections. The bug only applies to certain use cases with VMConnect (i.e. Remote Desktop connections are unaffected) and there are two possible workarounds …
Mark Wilson explains this bug on his blog: http://www.markwilson.co.uk/blog/2010/09/extending-certificate-validity-to-avoid-mousevideo-refresh-issues-with-the-hyper-v-virtual-machine-connection.htm
Ahmed Bisht, Senior Program Manager from the Microsoft Clustering & High Availability team published a nice PowerShell script for exposing the free disk space in Cluster Shared Volumes.
Check out his blog at:
If you see prolonged startup time with Windows Server 2008 R2 servers with the Hyper-V role enabled, this can be caused by a large registry hive that increases after every backup.
“The issue occurs because of a large number of orphaned registry keys. The Volume Shadow Copy Service (VSS) snapshots create many registry keys. However, they are not deleted after the VSS snapshot operations are completed.”
The solution is hotfix KB982210: http://support.microsoft.com/kb/982210
I came across a new Hyper-V R2 hotfix on the list related to Intel Westmere processors (Nehalem EP/W5580).
“This issue occurs because Intel Westmere processors have a new Virtual Machine Control Block (VMCB) caching feature. This feature is added to provide a virtualization assistance to increase the hypervisor performance. Because this feature was introduced after Windows 2008 SP2 and Windows 2008 R2 were released, the hypervisor does not handle the VMCB caching correctly. Therefore, the system memory may be corrupted. This behavior can cause the stop error 0x0000001a.”
The complete list of Hyper-V R2 updates can be found on the following Technet page:
Some time ago I asked MS to split the list for Hyper-V updates in R1 and R2. Well … they did and thanks a lot!
Hyper-V Update List for Windows Server 2008 R2:
Hyper-V Update List for Windows Server 2008:
Update April 2010:
A recent hotfix was made available by Microsoft as a workaround for a problem with Live Migration win AMD Family 10h processors.
When you run Windows Server 2008 R2 Hyper-V on a computer that uses AMD Family 10h processors, the host computer may restart unexpectedly or stop responding. When the computer restarts or stop responding, you receive no error messages.
This issue may occur when the Live Migration feature is used to move a virtual machine (VM) from one Windows Server 2008 R2 Hyper-V-based node to another node. This problem usually affects the source node that is the original location of the VM and usually does not affect the target node that is the new location where the VM will be moved.
Note This issue may occur in other scenarios and occurs not only in Live Migration scenarios.
Look for erratum #383 in this AMD support document
Thanks to IT Core Blog
[Update: Windows Server 2008 R2 SP1 Release Candidate Released http://hyper-v.nu/blogs/hans/?p=366]
Today Microsoft officially announced that SP1 – which will be made available as a single service pack for both Windows 7 and Windows Server 2008 R2 – will enable dynamic memory for Hyper-V R2.
Currently each VM gets a fixed amount of memory. Ten VM’s with 2GB each, consume 20GB of RAM of the server. This limits the number of VM’s that can be running on a single physical host because unused memory is not available for adding additional VM’s.
The net effect is a higher virtual machine density per Hyper-V R2 host.
Making greater use of Dynamic Memory could have an impact on performance, but the slider which is shown below, allows the administrator to decide whether to opt for performance, for density or somewhere in between.
There was no release date communicated for SP1.
A second new feature in SP1 for R2 is Remote FX, a new set of platform capabilities in Windows Server Remote Desktop Services that enables users of virtual desktops and applications to enjoy a rich, local-like experience over the network from a broad range of client services. Remote FX is an RDP enhancement allowing remote workers to access any type of applications, improving end user productivity.