System for maintaining a data base log

Details System for maintaining a data base log System for maintaining a data base log

G - Physics

06

F

G06F 17/30 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2195817

The invention relates to a system for maintaining a log of incoming records for a database system. Seek points are inserted into the compressed data log in a manner that allows recovery to start from a specified point without a need for decompressing earlier portions of the log. The initial block of data is used as the compression dictionary. A new compression sequence using the same initial compression dictionary is started at each seek point.

Système permettant de tenir un journal de documents d'entrée pour un système de base de données. Des repères sont insérés dans le journal de données comprimées de façon à permettre la récupération à partir d'un point précis sans avoir à décomprimer les parties précédentes du journal. Le bloc de données initial est utilisé comme dictionnaire de compression. Une nouvelle séquence de compression utilisant le même dictionnaire de compression initial débute à chaque point de repère.

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