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Buffer-Deferred Write Algorithm in a Relational Data Base and Virtual Machine System Context

IP.com Disclosure Number: IPCOM000039650D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Gumaer, RA Haderle, DJ Shibamiya, A Teng, JZ [+details]

Abstract

This invention relates to a buffer management method utilized in relational data base system applications. Relational data base systems are designed to support large data bases with applications that often require a large number of input/output (I/O) operations. It is desired to minimize I/O activity. Thus, the contents of data base buffers which are likely to be reused are kept in virtual memory. Data buffers that have been modified must eventually be written back to their respective data bases. In relational data base systems that only support synchronous write protocols, write I/Os must be performed under the process during COMMIT for changes that have been made prior to the COMMIT point.