Managing states with delta pager

Details Managing states with delta pager Managing states with delta pager

2005-12-30

2008-09-30

Le, Debbie M. (Department: 2166)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C711S141000

Reexamination Certificate

active

07430553

ABSTRACT:
A delta pager maintains a database with atomic, isolated transactions. When a transaction seeks to make changes to the database, the delta pager stores the changes in write buffers, and applies the changes when intervening transactions do not literally or substantively change the state of the database relied upon by the transaction. The delta pager applies the changes to commit the transaction by conjoining the write buffers with the current state of the database to form a new data structure representing the state of the database. The delta pager coalesces write buffers to maintain efficiency, subject to snapshots the delta pager respects to preserve selected states of the database. The delta pager makes selected sections of the database durable by moving selected data to a durable store. The delta pager also provides cache objects between the durable store and current transactions to promote efficient access to data.

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