Integrated storage virtualization and switch system

Details Integrated storage virtualization and switch system Integrated storage virtualization and switch system

2005-04-29

2010-06-29

Bragdon, Reginald G (Department: 2189)

Electrical computers and digital processing systems: memory

Address formation

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C711S206000, C711SE12059

Reexamination Certificate

active

07747836

ABSTRACT:
A system integrates an intelligent storage switch with a flexible virtualization system to enable efficient service of file and block protocol data access requests for information stored on the system. A storage operating system executing on a storage system coupled to the switch implements the virtualization system to provide a unified view of storage to clients by logically organizing the information as named files, directories and logical unit numbers. The virtualization system is illustratively embodied as a file system having a write allocator configured to provide a flexible block numbering policy that addresses volume management capabilities, such as storage virtualization, at a finer granularity (e.g., a single block) than that of previous non-flexible storage virtualization schemes. The flexible block numbering policy also yields substantial benefits in terms of increased write efficiency and elimination of storage “hot spots”, as well as a compelling point-in-time read-only data image (snapshot) mechanism.

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