Anton A Prenneis

US Patent:

6393583, May 21, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/181985

Inventors:

Kalman Zvi Meth - Netanya, IL
Anton Prenneis - Highland NY
Adnan M. Agbaria - Musmus, IL
Patrick Francis Caffrey - Glasco NY
William Joseph Ferrante - Hyde Park NY
Demetrios K. Michailaros - Lake Katrine NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02H 305

US Classification:

714 12, 714 13

Abstract:

A checkpoint of a parallel program is taken in order to provide a consistent state of the program in the event the program is to be restarted. Each process of the parallel program is responsible for taking its own checkpoint, however, the timing of when the checkpoint is to be taken by each process is the responsibility of a coordinating process. During the checkpointing, various data is written to a checkpoint file. This data includes, for instance, in-transit message data, a data section, file offsets, signal state, executable information, stack contents and register contents. The checkpoint file can be stored either in local or global storage. When it is stored in global storage, migration of the program is facilitated. When a parallel program is to be restarted, each process of the program initiates its own restart. The restart logic restores the process to the state at which the checkpoint was taken.

US Patent:

6401216, Jun 4, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/181981

Inventors:

Kalman Zvi Meth - Netanya, IL
Anton Prenneis - Highland NY
Adnan M. Agbaria - Musmus, IL
Patrick Francis Caffrey - Glasco NY
William Joseph Ferrante - Hyde Park NY
Demetrios K. Michailaros - Lake Katrine NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

714 16, 712228

Abstract:

A checkpoint of a parallel program is taken in order to provide a consistent state of the program in the event the program is to be restarted. Each process of the parallel program is responsible for taking its own checkpoint, however, the timing of when the checkpoint is to be taken by each process is the responsibility of a coordinating process. During the checkpointing, various data is written to a checkpoint file. This data includes, for instance, in-transit message data, a data section, file offsets, signal state, executable information, stack contents and register contents. The checkpoint file can be stored either in local or global storage. When it is stored in global storage, migration of the program is facilitated. When a parallel program is to be restarted, each process of the program initiates its own restart. The restart logic restores the process to the state at which the checkpoint was taken.

US Patent:

6338147, Jan 8, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/182555

Inventors:

Kalman Zvi Meth - Netanya, IL
Anton Prenneis - Highland NY
Adnan M. Agbaria - Musmus, IL
Patrick Francis Caffrey - Glasco NY
William Joseph Ferrante - Hyde Park NY
Demetrios K. Michailaros - Lake Katrine NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

714 13, 711144

Abstract:

A checkpoint of a parallel program is taken in order to provide a consistent state of the program in the event the program is to be restarted. Each process of the parallel program is responsible for taking its own checkpoint, however, the timing of when the checkpoint is to be taken by each process is the responsibility of a coordinating process. During the checkpointing, various data is written to a checkpoint file. This data includes, for instance, in-transit message data, a data section, file offsets, signal state, executable information, stack contents and register contents. The checkpoint file can be stored either in local or global storage. When it is stored in global storage, migration of the program is facilitated. When a parallel program is to be restarted, each process of the program initiates its own restart. The restart logic restores the process to the state at which the checkpoint was taken.