International Business Machines Corporation

Demetrios K Michailaros

Kalman Zvi Meth

Adnan M Agbaria

Su-Hsuan Huang

William Joseph Ferrante

Patrick Francis Caffrey

William Gole Tuel, Jr

Anton Prenneis

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.

System of performing checkpoint/restart of a parallel program

Method of performing checkpoint/restart of a parallel program

Program products for performing checkpoint/restart of a parallel program

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Demetrios K Michailaros