Migrating OpenVMS Storage Environments without Interruption/Disruption
HP OpenVMS is a 24x7x365 operating system with 99.9999% availability, leading to an incredibly low total cost of ownership (TCO). Its clustering, considered the gold standard by major research firms, allows managers to add or remove processors from the cluster virtually at will, producing cluster uptimes that are often measured in years, not days. The dynamics of adding and removing processors from a cluster is well understood. The ability to rearrange storage components without interrupting a production system is often far less familiar.
Maintaining storage environments is not limited to failed volumes or expansion. Migration to new generations of storage technology, changes between different storage models or vendors; different RAID0 choices, storage server resource pools, and other changes can make logical volumes unavailable for periods of time. Host-based volume shadowing enables making these changes operationally invisible to applications.
This session will examine how the facilities in HP OpenVMS, including online device configuration, dissimilar device shadowing, and other features, can be used to achieve seamless operation.
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