VMware: Maintenance Mode Improvements in vSphere 6.0 Update 2
vSphere 6.0 Update 2 has launched and with it comes a very simple change with the way that VMs and Templates are evacuated from hosts that enter Maintenance Mode. In all prior versions, when a host enters Maintenance Mode, DRS will evacuate the host by placing all the running VMs, powered off VMs, and the templates on other hosts within the cluster. However, under certain conditions the order of operations produces very different results. For math geeks, (4+2)2 ≠ 4+2×2.
Starting with vSphere 6.0 Update 2, when a host enters Maintenance Mode the host will evacuate all the powered off VMs and templates first, and then proceed to vMotion all the powered on VMs. This is probably not something that most will consider a big deal, but for some customers this small change will have a big impact.
Picture a situation where external services are provisioning VMs that use templates and those templates are stored on the host entering Maintenance Mode. …
Read the entire article here, Maintenance Mode Improvements in vSphere 6.0 Update 2
via the fine folks at VMware!