Emc Corporation

Wolfgang Klinger

William Z Zahavi

James L Davidson

David M Zeryck

Weijing Song

Oufei Zhao

M Michael Hadavi

John Freeman

Daniel Rice

Alexander V Dunfey

In an analyzer device, a method for identifying a logical unit (LUN) of a data storage system as a candidate for migration to a second storage group is presented. The method includes receiving, by the analyzer device, a set of data associated with activity of the LUN of a first storage group, comparing, by the analyzer device, a performance metric value of a performance metric of the set of data, associated with the LUN, to a performance metric threshold associated with the performance metric, and when the performance metric value corresponds to the performance metric threshold, categorizing, by the analyzer device, the LUN as a candidate for storage on the second storage group, the second storage group distinct from the first storage group and having a disk type different from that of the first storage group.

Migration analyzer for hardware-based storage tiering

Described are techniques for managing a wait queue in a system. A plurality of buckets associated with the wait queue are defined. Each of the plurality of buckets is associated with one of more queue depth values and one or more counters. For each received request for service, a current depth of the wait queue indicating a number of other requests included in the wait queue waiting to be serviced is determined, a bucket in accordance with the current depth of the wait queue is selected and information is recorded by updating said one or more counters of the bucket selected. The received request is placed in the wait queue if there is another request currently being serviced or if there is at least one other request currently in the wait queue.

Techniques for monitoring and managing wait queues

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Whitinsville, MA, United States of America

Wolfgang Klinger