Allan Feldman

US Patent:

6625117, Sep 23, 2003

Filed:

Sep 30, 1999

Appl. No.:

09/409139

Inventors:

Shawfu Chen - New Milford CT
Robert O. Dryfoos - Poughkeepsie NY
Allan Feldman - Poughkeepsie NY
David Y. Hu - Poughkeepsie NY
Peter A. Lewis - Jacksonville FL
Masashi E. Miyake - Poughkeepsie NY
Wei-Yi Xiao - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01R 3108

US Classification:

370227, 370462

Abstract:

A method and apparatus for switching messages from a primary message channel to a secondary message channel in a message queuing system in which messages are placed in a first transmission queue of a local system for transmission to a remote system via a primary message channel. A local queue manager continuously checks to see whether a high water mark has been reached in the first transmission queue, indicating an apparent failure in the primary message channel. On determining such an apparent failure in the primary message channel, the queue manager determines whether the secondary message channel is associated with the first transmission queue. If so, the queue manager activates the secondary message channel to serve said first transmission queue. If, on the other hand, the secondary message channel is associated with another transmission queue, the queue manager transfers messages already in the first queue to the other queue and redirects any new messages intended for the first queue to the other queue. If the other transmission queue was previously empty, the secondary message channel is activated by a trigger to serve the other queue.

US Patent:

6901533, May 31, 2005

Filed:

Aug 23, 2001

Appl. No.:

09/938029

Inventors:

Shawfu Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
David Y. Hu - Poughkeepsie NY, US
Jason A. Keenaghan - Wappingers Falls NY, US
Peter A. Lewis - Jacksonville FL, US
Peter G. Sutton - Lagrangeville NY, US
Mei-Hui Wang - Brookfield CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F011/20

US Classification:

714 16, 714 10, 714 13, 714 15

Abstract:

When a processor becomes inactive, queues resident in the memory of that processor become inaccessible. Thus, in order to access those queues, an active processor takes over ownership of one or more of the inaccessible queues. Each queue may be rebuilt prior to its take over to ensure that it has up-to-date information.

US Patent:

7068604, Jun 27, 2006

Filed:

Aug 23, 2001

Appl. No.:

09/938031

Inventors:

Shawfu Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
David Y. Hu - Poughkeepsie NY, US
Jason A. Keenaghan - Wappingers Falls NY, US
Peter A. Lewis - Jacksonville FL, US
Peter G. Sutton - Lagrangeville NY, US
Mei-Hui Wang - Brookfield CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04J 1/16

US Classification:

370235

Abstract:

Memory resident queues are monitored at predefined time intervals. When the monitoring indicates that a particular queue is not being serviced at a desired level, then action is taken to sweep one or more messages from the queue. The sweeping of the messages frees up system resources associated with the messages, thus allowing other tasks to be serviced. If, after the sweeping, it is determined that the queue can handle additional messages, then one or more messages are placed back on the queue.

US Patent:

7089564, Aug 8, 2006

Filed:

Feb 22, 2001

Appl. No.:

09/790853

Inventors:

Shawfu Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
David Y. Hu - Poughkeepsie NY, US
Jason A. Keenaghan - Wappingers Falls NY, US
Peter G. Sutton - Lagrangeville NY, US
Mei-Hui Wang - Brookfield CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46

US Classification:

719314, 718101, 718104

Abstract:

A highly available, high-performance memory queue. Locking of the queue is minimized in order to provide a highly available queue and to improve performance of the queue. Multiple updates of the queue can occur under a single lock. Further, messages of the queue are persistent. A time-initiated checkpointing process, as well as the storing of message information on a recovery log, ensures the persistence of the queue messages.

US Patent:

7096335, Aug 22, 2006

Filed:

Aug 27, 2003

Appl. No.:

10/649437

Inventors:

Shawfu F. Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
John M. Tarby - Sherman CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711165, 711117

Abstract:

A structure and method is provided for optimizing memory resources, by establishing a history file for recording data processing criterion. The history file is then recorded in a first memory. Information either stored in the first memory or scheduled to be stored in the first memory can then be selectively reallocated and stored in an alternate memory. All or portions of the reallocated information can then be restored back to the first memory subsequently, with reference to the history file.

US Patent:

7140017, Nov 21, 2006

Filed:

Feb 22, 2001

Appl. No.:

09/790781

Inventors:

Shawfu Chen - New Milford CT, US
Robert O Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
David Y Hu - Poughkeepsie NY, US
Jason A Keenaghan - Wappingers Falls NY, US
Peter A Lewis - Jacksonville FL, US
Peter G Sutton - Lagrangeville NY, US
Mei-Hui Wang - Brookfield CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46
G06F 15/16

US Classification:

718101, 709206

Abstract:

A plurality of batch lists are maintained by a channel in order to improve the efficiency of the channel in performing messaging between a sender and a receiver. For example, a Next Batch list is used to prefetch messages to be sent to the receiver from the sender; a Current Batch list includes the messages currently being transmitted to the receiver or waiting confirmation; and an Acknowledged Batch List includes the messages confirmed by the receiver. This allows the functions of prefetching messages, sending messages and deleting confirmed messages to be performed in parallel.

US Patent:

7216349, May 8, 2007

Filed:

Jun 5, 2002

Appl. No.:

10/164127

Inventors:

Shawfu Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
Ric C. Hung - Wappingers Falls NY, US
John M. Tarby - Sherman CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 13/00

US Classification:

719314, 719310, 719313, 718100

Abstract:

A method for triggering message queue applications, comprising performing a first trigger process, the first trigger process including: a first application evaluating a queue for a trigger message; the first application determining whether a second trigger process is already being performed for the queue; and the first application invoking a second application where the invoking is in response to the trigger message.

US Patent:

7577956, Aug 18, 2009

Filed:

Jul 14, 2006

Appl. No.:

11/457508

Inventors:

Shawfu Chen - New Milford CT, US
Robert O. Dryfoos - Hopewell Junction NY, US
Allan Feldman - Poughkeepsie NY, US
David Y. Hu - Poughkeepsie NY, US
Jason A. Keenaghan - Wappingers Falls NY, US
Peter A. Lewis - Jacksonville FL, US
Peter G. Sutton - Lagrangeville NY, US
Mei-Hui Wang - Brookfield CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/46
G06F 9/26
G06F 15/16

US Classification:

718101, 718100, 711213, 709217

Abstract:

A plurality of batch lists are maintained by a channel in order to improve the efficiency of the channel in performing messaging between a sender and a receiver. For example, a Next Batch list is used to prefetch messages to be sent to the receiver from the sender; a Current Batch list includes the messages currently being transmitted to the receiver or waiting confirmation; and an Acknowledged Batch List includes the messages confirmed by the receiver. This allows the functions of prefetching messages, sending messages and deleting confirmed messages to be performed in parallel.