If I would ask you what the max amount of VMs per Host is for vSphere what would your answer be? My bet is that your answer would be 320 VMs. This, of course, based on the “virtual machines per host” number that page 5 of the Configurations Maximum for vSphere shows. But is this actually the correct answer? No [...]

I just noticed this awesome work by LucD. He developed two scripts which can import and export DRS affinity rules. Especially in large environments or environments that have multiple affinity rules this is an excellent solution. Take a look at the link above for more details. Luc posted the script half way down the topic in text but also added [...]

How cool is this video about Distributed Power Management, it demonstrates how DPM works and what the possible utility savings could be. Just watch it:

Seva, a VMware Technical Account Manager, put together a cool table with the implications of a VirtualCenter crash. This is a follow up to my blog about VirtualCenter getting more important by the minute. I think the most important thing to remember is that the VM’s keep running whatever happens to your VC Server and HA will still work if [...]

During the last couple of ESX 3.5 and VC 2.5 implementations I encountered some weird DRS/HA behavior: During the reboot of a VM ESX decided to vmotion the VM, as you can imagine this took a lot longer than normal due to the memory being excessively active. When the DRS Affinity Rules in a two cluster node is set to [...]

VMwarewolf already posted this fix on his blog but had to remove it… Now VMware added it to their knowledge base. Check out the original article because it may change in time. For the lazy people I included how to diagnose the problem and more… Diagnose the problem: Use the VI Client to log in to VirtualCenter as an administrator. [...]