Data processing: database and file management or data structures – Database design – Data structure types
Patent
1997-06-16
1999-11-30
Lintz, Paul R.
Data processing: database and file management or data structures
Database design
Data structure types
707 8, 707200, G06F 1730
Patent
active
059959819
ABSTRACT:
In a replicated database environment, all nodes (30) monitor the well-being of each other by receipt of node status messages over a network (20). When a node is detected as no longer being alive, the other nodes deduce that such node has failed. When a node failure is detected, a nodestatus record having a nodedown value is written into a node log (80) with respect to the failing node. Similarly, when a node comes alive or a new node becomes known to the network, a node status record having a nodeup value is written into the node log. When a local node fails and then is restarted, the local node uses the contents of its node log in order to determine how to initialize the value of a replicated data object. By reading its node log, the local node can decide whether the data object can be initialized from its disk (32) or not.
REFERENCES:
patent: 5301309 (1994-04-01), Sagano
patent: 5440727 (1995-08-01), Bhide et al.
patent: 5544359 (1996-08-01), Tada et al.
patent: 5608865 (1997-03-01), Midgely et al.
patent: 5687363 (1997-11-01), Oulid-Aissa et al.
patent: 5737601 (1998-04-01), Jain et al.
Patent Abstracts of Japan, vol. 014, No. 238 (P-1050), May 21, 1990 & JP 02 059942 A (Hitachi Ltd), Feb. 28, 1990.
Skeen et al, "A Formal Model of Crash Recovery in a Distributed System", Fifth Berkeley Workshop on Distributed Data Management and Computer Networks, Berkeley, CA, USA, Feb. 3-4, 1981, vol. SE-9, No. 3, ISSN 0098-5589, IEEE Transactions on Software Engineering, May 1983, USA, pp. 219-228.
Fleurantin Jean Bolte
Lintz Paul R.
Telefonaktiebolaget LM Ericsson
LandOfFree
Initialization of replicated data objects does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Initialization of replicated data objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Initialization of replicated data objects will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1687379