Pulled the following from VMware’s site. Just FYI…

This is a very uninspired entry, but I took some time off to go to Trinidad last week and have been daydreaming about Maracas Beach. I hope to get some worthwhile posts up here soon. 🙂

VMware vCenter Site Recovery Manager is licensed per-CPU for ESX hosts that are running virtual machines that are protected by VMware Site Recovery Manager. If VMware vCenter Site Recovery Manager is configured only to fail over virtual machines from the protected site to the recovery site, VMware vCenter Site Recovery Manager licenses are required only for the hosts at the protected site that are running the protected virtual machines. If VMware vCenter Site Recovery Manager is configured to fail over a set of virtual machines from a protected site to a recovery site at the same time as it is configured to fail over a different set of virtual machines from the recovery site to the protected site, VMware vCenter Site Recovery Manager licenses need to be purchased for the protected hosts at both sites.

A VMware vCenter Site Recovery Manager deployment will also require the necessary licenses of VMware vCente Server and VMware Infrastructure. VMware vCenter Site Recovery Manager requires a licensed VMware vCenter Server at both protected and recovery sites because both VMware vCenter Server instances are active instances. VMware vCenter Site Recovery Manager also requires enough VMware Infrastructure licenses at the recovery site to meet the minimum resource requirements of the virtual machines that are configured to fail over to the recovery site at all times. The VMware Infrastructure licenses at the recovery site can be used to run other virtual machines even while being part of a VMware vCenter Site Recovery Manager configuration.

Single-direction failover. Requires licenses for 2 VirtualCenter Management Servers, 10-CPU VMware Infrastructure, and 6-CPU Site Recovery Manager.

Bi-directional failover. Requires licenses for 2 VirtualCenter Management Servers, 10-CPU VMware Infrastructure, and 10-CPU Site Recovery Manager.