06732124 is referenced by 538 patents.

A data processing system having an efficient logging mechanism which stores log records for repairing a file system when its consistency is lost. When there is a transaction attempting to update metadata stored in metadata volumes, a metadata loading unit reads the requested metadata objects out of the volumes and loads them to a metadata cache. At that time, a metadata manager updates its internal database to record from which metadata volume each metadata object has been fetched. Each time the transaction updates a metadata object in the cache, a log collection unit collects a copy of the updated metadata object, together with a volume ID which indicates its home metadata volume. The collected data is temporarily stored in a log buffer, and finally saved into a log volume by a log writing unit.

Title
Data processing system with mechanism for restoring file systems based on transaction logs
Application Number
9/501568
Publication Number
6732124 (B1)
Application Date
February 9, 2000
Publication Date
May 4, 2004
Inventor
Seishiro Hamanaka
Kawasaki
US
Sadayoshi Taniwaki
Kawasaki
US
Satoru Yamaguchi
Kawasaki
US
Masashi Sumi
Kawasaki
US
Mamoru Yokoyama
Kawasaki
US
Michihiko Koseki
Kawasaki
US
Agent
Greer Burns & Crain
US
Assignee
Fujitsu
US
IPC
G06F 17/30
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