Since we have installed our Microsoft Hyper-V Cluster on the Cisco UCS, Microsoft released some patches for Hyper-V, Windows and Clustering.
There are two really important Updates which I would recommend for Hyper-V Clusters.
The first is Service Pack 1 for Windows Server 2008 R2 and Hyper-V Server 2008 R2. Service Pack 1 brings a lot of Hotfixes for Hyper-V, Failover Cluster Feature and other Microsoft Server features. And it brings also a two new features called Dynamic Memory and RemoteFX.
The second one is a hotfix for Servers with Intel Westmere or Sandy Bridge and has a large amount of physical memory. Most of the Cisco UCS Blades will meet this configuration. You can get more information on this Hyper-V hotfix here.
This two updates will bring you a much better experience with your Hyper-V Cluster. It will improve performance, stability and it will add new features.
If you use the /PAE (Wikipedia Link: Physical Address Extension) switch, the pagefile is not limited to 4096MB anymore. Using the PAE switch limits the pagefile to 16TB, this should be enough for the most Windows Server 2003 32-bit systems. If you don’t use PAE the limit of the Pagefile remains 4GB.
By the way, Windows Server 2003 x64 can also have pagefiles up to 16TB and Windows Server 2003 for IA64 systems can have pagefiles up to 32TB. And for all versions, Windows Server 2003 supports up to 16 pagefiles.
For more information on memory limits in Windows Server 2003 check out this TechNet Blog post.
Thank goes to Ethan Anderson for giving me this information.
The pagefile size on Windows Server 2003 x86 and other Windows x86 platforms is limited to 4095 MB per pagefile. But a lot of Windows Server 2003 systems already have 4GB RAM and are using PAE (Physical Address Extension) to use them. So it would be useful to create more than 4 GB pagefiles.
Microsofts solution for this is to create multiple pagefiles. You can now create multiple pagefiles on different partitions. If you don’t have enough partitions or you just have one, you can create multiple pagefile in different folders by using the Windows Registry.
Create the folders on the drive where the pagefiles should be located. For example, C:\Pagefile1, C:\Pagefile2, and C:\Pagefile3.
I would recommend to create a backup of the registry
locate this key:
Edit the value “PagingFiles”
Remove the existing values and add the following values:
C:\Pagefile1\pagefile.sys 4096 4096
C:\Pagefile2\pagefile.sys 4096 4096
C:\Pagefile3\pagefile.sys 4096 4096
Note: It’s still recommended to have the Pagefiles on the same partition as the system