International Business Machines Corporation

Brian James King

Timothy J Schimke

Robert Edward Galbraith

Brian Eric Bakke

William J Maitland, Jr

Timothy James Larson

Charles Scott Graham

Adrian Cuenin Gerhard

Kyle Alan Lucke

James Brian Cunningham

Rick A Weckwerth

Baltazar De Leon, Iii

Andrew T Koch

Kristopher Craig Whitney

A vendor independent partition interface between a logical partition and an adjunct partition associated with a self-virtualizing IO resource is used to effectively abstract away vender-specific interface details for the self-virtualizing IO resource. By doing so, vender-specific implementation details may be isolated from the operating systems resident in logical partitions, thus requiring only changes in vendor specific firmware in order to support new or revised self-virtualizing IO resources.

Virtualization of vendor specific network interfaces of self-virtualizing input/output device virtual functions

A method and apparatus are provided for dynamically determining a primary adapter in a heterogeneous N-way adapter configuration. Each of the adapters generates information about itself and exchanges the information with all other adapters. First a decision-making adapter is identified. Then the decision-making adapter compares the adapter-generated information of all the adapters and makes a decision determining the primary adapter. The decision-making adapter communicates the decision to all other adapters. The determined primary adapter assumes a role as the primary adapter and the other adapters assume a role as a secondary adapter.

Apparatus for dynamically determining primary adapter in a heterogeneous N-way adapter configuration

Two stage method for dynamically determining primary adapter in a heterogeneous N-way adapter configuration

A method and apparatus are provided for implementing distributed (SCSI) devices using enhanced adapter reservations. A plurality of adapters is provided. Each adapter implements a plurality of logical devices with each logical device respectively coupled to a port of the distributed SCSI devices. The adapters manage reservations for the plurality of logical devices selectively using a no reservation state, an implicit reservation state, and an explicit reservation state. The adapters arbitrarily assign one adapter for managing each of the plurality of logical devices.

Method and apparatus for implementing distributed SCSI devices using enhanced adapter reservations

In a first aspect, a method is provided for updating a compressed cache. The method includes the steps of (1) initiating an update routine for replacing first data stored within the cache with second data, wherein a first section of a compressed data band stored in the cache includes the first data and a second section of the compressed data band includes third data; and (2) in response to initiating the update routine, replacing the first data within the compressed data band with the second data without decompressing the third data. Numerous other aspects are provided.

Method and system for updating data in a compressed read cache

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Rochester, MN, United States of America

Brian James King