I have a pre-production Nutanix block that I've been preparing for production use. My small datacenter experienced a failure in both street and UPS power a few nights ago, after which I discovered that guest VMs are set to manual restart by default in vCenter 5.5 when the host is powered up. I see the CVM on each node is set to automatically power on with the host afer a 30 second delay, which must be a Nutanix default.
So the question is, is it a good idea to power up guest VMs automatically with host power at all? If so, how long after the CVM is powered on should guest VMs wait to power up if they're set to auto start? Is the 120 seconds reasonable, or does the power up order imply that #1 must be fully operational before #2 is even allowed to start?
p.s., this question has really nothing to do with vCenter HA, best practices for which are documented reasonably well in the Nutanix lit. I'm not using VMWare HA, so my question isn't even this complicated.