Kelly M Carpenter

US Patent:

6910153, Jun 21, 2005

Filed:

Jan 3, 2002

Appl. No.:

10/039355

Inventors:

Kenneth Michael Kapulka - San Jose CA, US
Marc Kenneth Duquette - San Jose CA, US
Kelly Scott Carpenter - Elgin TX, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F011/00

US Classification:

714 8, 711162

Abstract:

A method and system for transparently recovering from a coupling facility failure are disclosed. In one method embodiment, the present invention determines, following the failure of a coupling facility, which data was previously assigned to that coupling facility. The present embodiment then prevents access to that failed coupling facility. Next, the present method embodiment selects a new storage location for the data which was previously assigned to the failed coupling facility. The present embodiment then assigns the data previously assigned to the failed coupling facility to a new storage location. In the present invention, the aforementioned steps are performed without requiring preallocation of white space in an alternate coupling facility.

US Patent:

55443451, Aug 6, 1996

Filed:

Nov 8, 1993

Appl. No.:

8/148707

Inventors:

Kelly S. Carpenter - Fremont CA
Gerard M. Dearing - San Jose CA
Jeffrey M. Nick - Fishkill NY
Jimmy P. Strickland - Saratoga CA
Michael D. Swanson - Poughkeepsie NY
Wendell W. Wilkinson - Hyde Park NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1300
G06F 1314

US Classification:

395477

Abstract:

A high-speed cache is shared by a plurality of independently-operating data systems in a multi-system data sharing complex. Each data system has access both to the high-speed cache and to lower-speed, upper-level storage for obtaining and storing data. Management logic in the shared high-speed cache is provided to meet the serialization and data coherency requirements of the data systems when sharing the high speed cache as a store-multiple cache in a multi-system environment.

US Patent:

58026002, Sep 1, 1998

Filed:

Nov 12, 1996

Appl. No.:

8/747721

Inventors:

Kevin Frank Smith - Morgan Hill CA
Kelly Carpenter - Elgin TX
Gary Malcolm King - Millbrook NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1200

US Classification:

711173

Abstract:

A data processing system dynamically balances allocation of storage areas in a shared coupling facility that is devoted to storage of directory entries and data blocks. Each directory entry includes information regarding the validity of a data block that is locally stored by one or more processor modules in the data processing system. The system includes a coupling facility having a cache memory wherein a first portion is allocated to storage of data blocks and a second portion is allocated to storage of directory entries. Each directory entry, associated with a data block, indicates the validity or invalidity of data contained in a copy of the data block maintained by a connected computer module in its local memory. Each computer module, upon requiring a first data block and determining that (i) the first data block is present in its local memory (i. e. , a buffer "hit"), but (ii) is not marked valid and (iii) is not present in the coupling facility (i. e.