Emc IP Holding Company LLC

Emc Corporation

Gregory S Schaffer

David W Harvey

Henry Austin Spang, Iv

Philippe Armangau

Christopher Alan Seibel

Long Zhang

Mark J Cariddi

H Austin Spang, Iv

Peter E Tolvanen

David John Agans

David F Winchell

A method, computer program product, and computing system for determining a queue depth and a flush rate for each of a plurality of pending data queues associated with a cache system, thus defining a queue depth/flush rate pair for each of the plurality of pending data queues. A predicted drain time is determined for each of the plurality of pending data queues based, at least in part, upon the queue depth/flush rate pair, thus defining a plurality of predicted drain times that are respectively associated with the plurality of pending data queues.

Cache management system and method

Improved techniques for maintaining cache coherence in a consistent state are provided. These techniques implement a data storage system using a journaled mirrored cache that ensures that storage operations making up certain transactions be performed atomically, so that a system failure does not result in data loss. The improved techniques also allow for efficient communication of mirroring information.

Techniques for maintaining cache coherence by atomically processing groups of storage commands

A method and system for use in managing enhanced write caching is disclosed. In at least one embodiment, the method and system comprises performing write-back caching operations using a write cache of a storage processor of a data storage system. A first cache page corresponding to a disk location is provided in the write cache. A host is allowed to write to a second cache page in the write cache corresponding to the same disk location. Both the first and second cache pages are maintained after acknowledging the write to the host.

Managing enhanced write caching

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Berlin, MA, United States of America

Gregory S Schaffer