Larry Kerschberg (auth.), Carol Small, Paul Douglas, Roger's Advances in Databases: 15th British National Conference on PDF

By Larry Kerschberg (auth.), Carol Small, Paul Douglas, Roger Johnson, Peter King, Nigel Martin (eds.)

ISBN-10: 3540632638

ISBN-13: 9783540632634

This publication includes the refereed court cases of the fifteenth British nationwide convention on Databases, BNCOD 15, held in London, in July 1997.
The 12 revised complete papers provided have been chosen from greater than 30 submissions. additionally incorporated are 10 poster shows and the invited lecture at the position of clever software program brokers in complex info platforms by way of Larry Kerschberg. The papers are prepared in topical sections on transaction processing, optimization, object-orientation and the web, and database integration.

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Additional resources for Advances in Databases: 15th British National Conference on Databases, BNCOD 15 London, United Kingdom, July 7–9, 1997 Proceedings

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Node I ~ .......... -t-~ 1oo~,p Node 11 Legend: .......... ",~ Log stream [ ZO04-hs ] Fragment replica Node 2 Node 12 Site A Site B Fig. 1. Fragment replicas at two sites with three nodes each. -p means primary, -hs means hot standby. 3 Self-Repair When a failed node does not recover within a certain time frame, a new copy of the lost replicas is automatically produced without waiting for manual intervention. This is done to reestablish the fault tolerance level prior to the crash. One self-repair approach is to use dedicated spares.

37, pp. 106-116, 1994. 56. M. Rusinkiewicz and others, "OMNIBASE: Design and Implementation of a Multidatabase System," Newsletter of the Computer Society of the IEEE Technical Committee on Distributed Processing, vol. 10, pp. 20--28, 1988. 57. A. Segev and J. Park, "Updating Distributed Materialized Views," IEEE Transactions on Knowledge and Data Engineering, vol. 1, pp. 173-184, 1989. 58. L. Seligman, "A Mediated Approach to Consistency Management Among Distributed, Heterogeneous Information Systems," In Information and Software Systems Engineering.

Q-rot declustering minimizes the takeover time, because the takeover is performed in parallel at multiple nodes. This is important since during the takeover parts of the database are temporarily unavailable. Unlike mirrored declustering, Q-rot declustering ensures the increased load for the nodes involved in the takeover to be spread over multiple nodes. , if node 0 in Figure 1 failed, node 10 and 11 at site B will take over the primary responsibility for fragment replica 1000 and 1004, respectively.

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Advances in Databases: 15th British National Conference on Databases, BNCOD 15 London, United Kingdom, July 7–9, 1997 Proceedings by Larry Kerschberg (auth.), Carol Small, Paul Douglas, Roger Johnson, Peter King, Nigel Martin (eds.)


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