http://itknowledgeexchange.techtarget.com/itanswers/can-you-still-have-more-virtual-environments-on-one-machine-with-vmware-than-hyper-v/ Tue, 18 Jun 2013 23:43:16 +0000 hourly 1 http://itknowledgeexchange.techtarget.com/itanswers/can-you-still-have-more-virtual-environments-on-one-machine-with-vmware-than-hyper-v/#comment-67161 beb4vm Wed, 19 Aug 2009 21:50:49 +0000 #comment-67161 The Memory Overcommitment feature of VMware is the key here. This allow one to increase consolidation ratios on hardware because you don’t have to allocate memory 1-to-1 with Physical RAM. For example, if I setup a Hyper-V host with 32GB of RAM and I know each of my Virtual Machines will have 4 GB of RAM assigned to them, the most VMs you can have on that host is 8. Doesn’t matter if your VM is only using 5% of the of that RAM while it is running, or maybe it is only going to use 5% of the physical CPU. ESX can return unused memory to other VMs that are calling for it or hold it until any VM calls for it. ESX with Vmotion can provide all the same functionality as mentioned by Edwin and has been doing that since 2006. In addition, if you add Dynamic Resource Scheduling (DRS), you can have VMs migrate automatically on demand as workloads change thus allow a balance of resources across your environment.

]]>