Multi-volume audit trails for fault tolerant computers

Details Multi-volume audit trails for fault tolerant computers Multi-volume audit trails for fault tolerant computers

1996-07-29

1998-06-09

Chung, Phung M.

G06F 1134

Patent

active

057648794

ABSTRACT:
A fault tolerant computer system distributes audit trail files containing audit records, across an arbitrary number of disk volumes. After one audit trail file becomes full, audit records are directed toward a next audit trail file stored on a different disk volume. Storage of newly generated audit rotates through the disk volumes in roundrobin fashion. Full audit trail files are eventually archived and their space becomes available again for renaming and storage of newly generated audit records. The number of audit records available for on-line recovery after a failure is not limited to the storage capacity of any single disk volume. Furthermore, there is no contention for disk access between archiving of full audit trail files and storage of newly generated audit records.

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Bernstein, P., et al., Concurrency Control and Recovery in Database Systems, Addison-Wesley, 1987, pp. 174-180.
Gray, J., "Notes on Database Operating Systems," Operating Systems--An Advanced Course, Springer-Verlag, 1978, pp. 459-480.
Audit Trail Compaction for Database Recovery, John Kaunitz and Louis Van Ekert, Jul. 1984, vol. 27, No. 7.
Gray, J., et al. "Transaction Processing: Concepts and Techniques," Morgan Kauffman, 1993, pp. 516-517.

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