International Business Machines Corporation

Tina Lynn Dunton

Douglas Paul Dunham

Nancy Lott Hobbs

Ophelia K Yip

Gregory John Tevis

Daniel Graham Douglas

John Earle Lindley

Clement Lambert Dickey

David W Groves

Paul Lawrence Bradshaw

Brian Augustine Delaire

Vincent Jomartin Hoang

Louis Leo Lorber

Barbara J Camacho

Roman David Druker

Edward Henry Daray

Ngoc V Nguyen

Andrew Dunn

His Tai (Steve) Hsu

Jason Michael Perkins

A storage area network (SAN) includes a plurality of digital data processors, each with a file system that effects access to one or more storage devices coupled to the SAN, for example, via an interconnect fabric. A process (e.g., executing on a manager digital data processor) responds to a file system over-extension notification from at least a selected one of the digital data processors, e.g., by assigning a further storage device to the selected digital data processor. The type of response is, more particularly, determined in accord with a hierarchically defined policy inherited, in whole or in part, from one or more hierarchical groups of which the digital data processor is a member.

Storage area network methods and apparatus with hierarchical file system extension policy

A storage area network has one or more digital data processors, e.g., hosts, in communication with one or more storage devices. At least a selected one of the hosts has an operating system in which a storage device must be claimed before the storage device can be accessed by applications programs executing on that host. The improvement is characterized by a selectively actuable filter, e.g., loaded with the selected host operating system, that when downloaded and actuated to a host intervenes to block claiming of one or more selected storage devices.

Storage area network methods and apparatus for dynamically enabled storage device masking

A storage area network (SAN), e.g., as described above, includes a one or more hosts digital data processors, each having a file system that effects access to one or more storage devices. Each processor is associated with multiple groups from respective levels of a hierarchy, e.g., a first processor group and a second processor group hierarchically descendant from the first processor group. A process, e.g., executing on a manager digital data processor, includes a graphical user interface that displays the processor groups as a hierarchical tree. Along, for example, with the identities of the processor groups, nodes of the displayed tree list attributes of the policy defined for each respective group.

Storage area network methods and apparatus for display and management of a hierarchical file system extension policy

The present invention provides system managed buffering within a data storage system. In a preferred embodiment, when a user or application program makes an I/O request, the data storage system passes control to system managed buffering. System managed buffering queries the user or application request to see how the user/application will be reading or writing the data. Based on the intended use, the system and method disclosed herein allocates the buffers for the user or application based on the intended access to the data, the file size and optionally, the storage device attributes. Also in accordance with the objects of the present invention, the system and method provide for continuous improvement over the previous buffer allocations.

System for dynamic allocation of I/O buffers for VSAM access method

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San Jose, CA, United States of America

Tina Lynn Dunton