We have 4 hosts in our environment, with 55 VMs running total. Each host has 128 GB of RAM. I want to install more RAM in each host, but due to the amount of resources we are using, migrating VM's to another host while we shut it down to install the RAM is out of the question. What is the best way to accomplish this? Can I shut down all the VM's and then all the hosts at once? Or should i power the VM's down 1 host at a time, install the RAM, power back on, and move on to the next? Running Vcenter Version 6.0.0 Build 3617395.
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