International Business Machines Corporation

Kenneth Gerald Linn

Kenneth Charles Vossen

Glen Warren Nelson

Jay Paul Kurtz

Larry J Cravens

Donald L Ward

Troy David Armstrong

James Lee Naylor

Joseph Thomas Writz

Thomas Richard Crowley

A method, apparatus and computer program product are provided for implementing feedback directed deferral on nonessential direct access storage device (DASD) operations. A kernel DASD I/O manager maintains a queue depth count value for a DASD unit and maintains a busy flag that indicates when the queue depth count value is greater than a predefined threshold. The kernel DASD I/O manager defers optional operations responsive to the busy flag being set for the DASD unit.

Implementing feedback directed deferral of nonessential DASD operations

An apparatus, program product and method for managing a number of physical connections to a peripheral device. A multipath driver provides a logical connection interface to a client. This interface allows the client to efficiently access the peripheral device over one or more of the physical connections. In so doing, the logical connection interface associates connections with a primary connection, deletes inactive connections from memory, as well as updates and uses a list of active connections to seamlessly route data to the peripheral device.

Multiple connection management system

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Rochester, MN, United States of America

Kenneth Gerald Linn