Will the Server Heartbeat service handle the View Composer service when doing a failover, or will only the plugins included in vCenter being used in the failover?
arjanhs, sorry for the delay, if the composer component is installed prior to the heartbeat installation then this will automatically be included when cloned and protected by heartbeat to insure uptime. If you decide to add view composer to a vCenter server protected with heartbeat we are arranging a KB to assist, but this isn't public as of yet. I would be willing to assist via email if necessary if this is the case.
Justin King
Product Specialist - VMware vCenter Server Heartbeat http://www.vmware.com/products/vcenter-server-heartbeat/