An 15 year veteran of VMware virtualization shares the best info about VMware technologies and the virtualization industry.
Wednesday, February 3, 2010
HYPER-V TO GET MEMORY OVERCOMMIT
Microsoft, after repeatedly downplaying the VMware's ability to overcommit memory has...you guessed it, quietly reversed it's stance on this feature and now states "we definitely need to put that in our product". Virtualization.info is now reporting Microsoft will put this feature in an upcoming release.
However, after reading some of the comments it appears some are questioning if this feature will really perform the same "transparent page sharing" and "ballooning" advanced techniques used by VMware or is it just using swap with a GUI setting for dynamic RAM allocation. This would be similar to what you can do with VMware by assigning a large amount of RAM to a VM and then setting a limit that you can adjust dynamically (the OS will see the Full amount of RAM but vSphere only allocates to the OS the limit amount--thus causing the vm to use swap inside the VM and have Dynamic RAM adjustment.
I am a Virtualization Architect for Novant Health, with 25 years of IT experience, and for the last 15 years I have had a dedicated focus on our Virtual infrastructure and strategy. I am a VCP2, VCP3, VCP4, and VCP550. Novant Health is a integrated system of 15 medical centers, 1,123 doctors in 343 clinical locations serving 3.5 million people throughout NC, SC, Virginia, and Georgia with 24,400 employees. We have a large and very successful Epic EHR implementation. I have been with Novant Health for 25 years. I was a featured speaker at the first annual NC/SC VMware Summit Event in 2008. I have been a speaker at several VMUG events in Charlotte and Greensboro, NC. I have been invited to blog for Virtualiziation Review and join VMware's Cloud Team. The past two years I have actively participated with a Healthcare Virtualization Community program ran by VMware that connected all VMware Healthcare customers on the east coast via Socialcast and monthly meetings geared towards sharing knowledge and best practice to help each other be more successful for our patients!