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Windows Server 2008 R2 virtual machine page files

Posted on 2012-08-28
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I currently am running Windows 2008 R2 with hyper v.  I am going to be running between 3-4 virtual instances of Win08R2 my question is regarding moving the page files to another spindle. I have two available but what I have been reading you should no put mutiple page files from different VM on the same drive.  Any ideas of how to handle this.
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Question by:cameljoe121
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by:Lee W, MVP
ID: 38343670
If you can separate them, great, if not, don't worry about it.  Put them on fast disks if you can.  (Larger Hyper-V servers don't have dozens of disks simply for pagefiles).

(And where have you been reading this?)
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by:cameljoe121
ID: 38343686
Mutipile places that said it was not a good idea to put Mutipile VM pages files on diffrent disks.  I have 2 7200 1TB drives mirrored.  I also have 2 free 146gb 15k drives available for the page files but I wasn't sure if I should put the host and VMs all one one disk or split the all between the 2 drives
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by:Lee W, MVP
ID: 38343728
Can you post one of the places you think is more reliable?  Sometimes people misunderstand context and I'm trying to get a clue who you're listening to?  An MVP?  Some guy on the Web?  Microsoft (and if MS, where on MS site?)
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by:cameljoe121
ID: 38343739
One of the sources.  I am just trying to figure out the best way to handle this by partitioning a single disk and putting them all on that or whatever I am not a expert on this aspect.  http://technet.microsoft.com/en-us/magazine/ff382717.aspx
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Lee W, MVP earned 2000 total points
ID: 38343763
Ok... that link has NOTHING to do with Hyper-V.

"what I have been reading you should no put mutiple page files from different VM on the same drive."  Virtual Machines and Hyper-V are mentioned no where in that link.

Let me put this another way, Virtual Memory is something that all but the systems with extreme amounts of RAM should have.  You have to think logically about virtual memory usage - Windows WILL use Virtual memory.  It almost doesn't matter how much RAM you have in a system. When you have multiple spindles, some may be more "idle" than others.  Those spindles should be the ones that get pagefiles on them.  When you're running multiple virtual machines, you want to have a FAST disk subsystem or your performance can suffer overall, not just from paging but instead of one computer access a drive, you have multiple computers accessing a drive.  For 4 systems, if they are lightly used, then I wouldn't worry much about performance right now.  Put the data that needs fast access on the fast spindles and I'd almost ignore pagefile placement.  And in the future, avoid getting anything less than 15K RPM drives for a virtual machine host.

Further reference materials include:
http://technet.microsoft.com/en-us/magazine/dd744830.aspx

And I'd suggest reading the free e-book Understanding Microsoft Virtualization Solutions (Second Edition) - http://blogs.msdn.com/b/microsoft_press/archive/2010/02/16/free-ebook-understanding-microsoft-virtualization-r2-solutions.aspx

(NOTE: that e-book does not include the additional features of 2008 R2 SP1 such as Dynamic RAM and RemoteFX).
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