I have 3 xen servers in a pool. I am planning to upgraded al 3 server's memory. I planned to do one by one at a time. when i do for pool master (xen1) i will move all vm's into xen2 and xen2, then i will shutdown the pool master and upgrade the RAM and start the pool master server. Is it the right way.
My doubt is, If I down the pool master for memory upgrade, will VM's in other server work?