Hyper-V and VHD Performance - Dynamic vs. Fixed

Hyper-V: Dynamic versus Fixed VHD Performance

Windows Virtualization Team Blog — Sat, 20 Sep 2008 00:38:53 GMT

Tim Litton posted a blog about performance optimization for Hyper-V, looking at fixed versus dynamic VHDs. Here's an excerpt: The following graph shows the relative performances for a number of different scenarios (with Dynamic VHD being the baseline).

Fixed disk versus Dynamic disk

Jaap's blog — Tue, 23 Sep 2008 12:19:18 GMT

zowel bij de Hyper-V dag als bij de DMCUG dag waren er performance vragen over fixed disk versus dynamic

Hyper-V and VHD performance

Vinod Kumar - ExtremeExperts.com — Fri, 26 Sep 2008 13:14:30 GMT

Catch the blog by the performance team around using Hyper-V and VHD files. Read it here .

re: Hyper-V and VHD Performance - Dynamic vs. Fixed

John Keating — Wed, 22 Oct 2008 18:05:28 GMT

Would you see the same peformance degradation if you pre-grew the VHD (let's say a 36 GB partition) with a filler file (let's say 10 GB) and then deleted it. That way, you would get around the possible file fragmenetation (which is probably causing the performance issue with the dynamic disks)?

With Dynamic Disks there is an extra translation done to map the logical disk location within the Dynamic VHD to the physical backing file location so Fixed Disks will always be faster than Dynamic Disks.

Details on the VHD format can be found here: http://www.microsoft.com/technet/virtualserver/downloads/vhdspec.mspx

When writing to a new location on a Dynamic VHD, it may be necessary to grow the physical backing file, which means more physical I/Os are required to satisfy the request.

Tim Litton, Program Manager, Windows Server Performance.

Hyper-V and VHD Performance - Dynamic vs. Fixed

Amit Pawar - Infrastructure blog — Thu, 13 Nov 2008 00:28:04 GMT

If you are in the midst of testing and deploying Virtual machines using the VHD file format on Hyper-V

PFE Hyper-V Ops Day – October

The World Simplified is a Virtual World — Tue, 25 Nov 2008 00:49:35 GMT

We ran a Hyper-V day at the end of October, and collated a series of useful links and best practice guidance.

Hyper-V: Dynamic versus Fixed VHD Performance

ITConfig Blog By Oshri Avitan — Wed, 14 Jan 2009 11:32:31 GMT

Tim Litton posted in his blog about performance optimization for Hyper-V, looking at fixed versus dynamic

New virtualboy.tv video: Hyper-V and Pass-Through Disks

virtualboy. — Fri, 27 Feb 2009 20:11:35 GMT

Video #9 in the Windows Server 2008 Hyper-V series, is this video focussed on the use of Pass Through

Virtualizing SharePoint Series - Recommendations for optimizing the performance of a virtualized SharePoint environment

UK SharePoint Team — Thu, 05 Mar 2009 23:14:47 GMT

Audience : SharePoint Solution Architect, SharePoint Infrastructure Architect, Consultant, IT Administrator

Hyper-V best practise with SharePoint

TechNet Team Blog Austria — Fri, 08 May 2009 17:40:41 GMT

Virtualisierung sind super, sei es für Legacy-Systeme, Testbetrieb oder Konsolidierung von Hardware.