Site Recovery Manager (SRM)
As written, cross-site replication at the VM or storage level is just the first step for DR. You will then need an entire set of rules to define how to recover your VMs in case of the main site failure. SRM delivers several features and functions, including centralized recovery plans, non-disruptive testing and automated orchestration, both for fail-over (in case of DR) and fail-back (in case the original site has been recovered).
SRM 6.1 adds support for stretched storage solutions over a metro distance from several major storage partners, and integration with cross vCenter vMotion when using these solutions for disaster avoidance.
Also, adding a stretched storage to an SRM deployment fundamentally reduces recovery ...
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