Database index journaling for enhanced recovery

Details Database index journaling for enhanced recovery Database index journaling for enhanced recovery

1986-06-13

1989-04-04

Zache, Raufe B.

Boots, shoes, and leggings

364300, G06F 100

Patent

active

048191566

ABSTRACT:
A quick recovery of logical files which provide alternate views of databases is provided. Unchanged logical file pages are journaled before being changed. Transactions affecting databases covered by the logical files are also journaled. To recover a logical file, the journaled unchanged pages of the logical file that correspond to the changed pages are inserted back into the logical file, and the transactions that were journaled are processed to provide the changes to the logical file and to the database. This brings the logical file and the underlying database up to date, and in synchronization with each other.

REFERENCES:
patent: 4507751 (1985-03-01), Gawlick et al.
patent: 4638426 (1987-01-01), Chang et al.
Haerder, "Principles of Transaction-Oriented Database Recovery" Computing Surveys, vol. 15, No. 4, Dec., 1983, pp. 287-317.
Gray, "The Recovery Manager of the System R Database Manager" Computing Surveys, vol. 13, No. 2, Jun., 1981, pp. 223-242.
Verhofstad, "Recovery Techniques for Database Systems" Computing Surveys, vol. 10, No. 2, Jun., 1978, pp. 167-195.

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