In a Virtual World, Performance is Always Physical
Systems have become increasingly virtual. Storage is no exception. Virtualization resolves some issues, but creates new issues. Those acclimated to local hard drives and or early generations of enterprise storage arrays often encounter these differences as unexpected performance anomalies. Present generation mass storage systems now provide multiple tiers: Caches; Solid State Drives; High-performance Hard Drives; and Bulk (Archival) Hard Drives, all of which are not visible to the OpenVMS instance. This virtualization is transparent to the OpenVMS systems manager, until it isn't. Attendees will be introduced to the different layers and hazards together with some approaches on addressing the challenges.
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