Migrating distributed vSwitch to new vCenter

Customer called me to ask how they could easily migrate their existing vCenter to a new vCenter including all distributed vSwitches. They were moving from vCenter 4.0 to vCenter 4.1 and at the same time creating an AD intergrated vCenter and moving from physical to a virtual vCenter. The upgrade path would be a difficult […]

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Large Pages, Transparent Page Sharing and how they influence the consolidation ratio

Everybody talks about the benefits of Transparent Page Sharing in vSphere environments and how they reduce the amount of memory needed in your vSphere host. Thanks to Transparent Page Sharing memory overcommit in a production environment has become mainstream. Not long ago I’ve written these two posts: – “Memory overcommit in production” http://www.gabesvirtualworld.com/memory-overcommit-in-production-yes-yes-yes/ which explains […]

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Memory management and compression in vSphere 4.1

With vSphere 4.1, VMware released a great new feature called Memory compression. At first, after reading the release notes I thought memory compression was just one step before swapping to disk would occur. However, after reading the whitepaper “Understanding Memory Resource Management in VMware ESX 4” I learned some more details I want to share […]

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