Since the arrival of vShpere 4.0 last May, there haven’t been many new updates to the cloud operating system that VMware introduced, until now. With the release of VMware vSphere 4.1 there are some nice updates and advancements on its scalability. The most notable enhancements are memory compression, the ability to have simultaneous vMotions, individual VM performance, and the substantial updating of the hardware compatibility list. The Scalability alone is a major enhancement, in some areas up to 3x more than vSphere 4.0. See the chart below:

Another interesting point is that there will no longer be the option to download the vSphere client from the ESX page, you will be directed to the downloads page at, however, with vCenter Server 4.1 the vSphere client will remain packaged with it. For more on what’s new with VMware vSphere 4.1, and a nice video from VMware CTO Steve Herrod. Ladies and gentlemen, start your upgrades!


Greg W Stuart
Greg is the owner and editor of He's been a VMware vExpert every year since 2011. Greg enjoys spending time with his wife and 3 kids. He works as a Sr. Consultant at VMware and resides in Northern Virginia, 15 minutes west of Washington DC.

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