I noticed an issue on ACS4.0 where when you place a host into maintenance mode, VMs are evacuated one at a time. The next job vmotion job kicks only after the previous completed.
This can take an *hour* or more if you have a large number of VMs (in my case 40 VMs) on each hypervisor - to get into maintenance mode. Does anyone know if this is going to be addressed in 4.1 or 4.2? Looked at CS-669: https://cwiki.apache.org/confluence/display/CLOUDSTACK/VMWare+Enhancements+-+Support+for+DRS+and+VM+HA Its unclear if this is being addressed.