Checkpointing filesystem

Patent · Tue May 17 00:00:00 EDT 2005

OSTI ID:949193

Gara, Alan G ^[1]; Giampapa, Mark E ^[2]; Steinmacher-Burow, Burkhard D ^[1]

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1. Mount Kisco, NY
2. Irvington, NY

The present in invention is directed to a checkpointing filesystem of a distributed-memory parallel supercomputer comprising a node that accesses user data on the filesystem, the filesystem comprising an interface that is associated with a disk for storing the user data. The checkpointing filesystem provides for taking and checkpoint of the filesystem and rolling back to a previously taken checkpoint, as well as for writing user data to and deleting user data from the checkpointing filesystem. The checkpointing filesystem provides a recently written file allocation table (WFAT) for maintaining information regarding the user data written since a previously taken checkpoint and a recently deleted file allocation table (DFAT) for maintaining information regarding user data deleted from since the previously taken checkpoint, both of which are utilized by the checkpointing filesystem to take a checkpoint of the filesystem and rollback the filesystem to a previously taken checkpoint, as well as to write and delete user data from the checkpointing filesystem.

• Research Organization: International Business Machines Corp., Armonk, NY (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: B517552
• Assignee: International Business Machines Corporation (Armonk, NY)
• Patent Number(s): 6,895,416
• Application Number: 10/258,515
• OSTI ID: 949193
• Country of Publication: United States
• Language: English