VMI 2.1 is a middleware communication layer that addresses the issues of availability, usability, and management in the context of large-scale SANs interconnected over wide-area grids. The rationale behind having the 2.1 version is the inclusion of novel features like the ability to stripe data across heterogeneous networks, the ability to fail over from one network onto a heterogeneous network, and the ability to add data filters and other
features dynamically, remotely, and even on per-connection basis.
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