Patent · US Active

Method, computer readable storage medium and computer system for obtaining snapshots of data

US9201738B2 · kind B2 · utility

4Cited by

7References

20Claims

0Family size

Assignee

GlobalFoundries Inc. · KY

Inventors

Peter Völk · Dresden, DE
Volkmark Kuhn · Dresden, DE
Sebastian Knappe · Dresden, DE
Andreas Rossmann · Radebeul, DE

Key dates

Filing date	Aug 14, 2013
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Apr 18, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG06F16/254
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method includes requesting a source database system including a source database table to record a transaction log including a plurality of transaction log entries that are representative of transactions including modifications of the source database table and to create a snapshot of the source database table during the recording of the transaction log. For each of a plurality of snapshot entries in the snapshot, one or more validity time intervals during which the snapshot entry is valid are determined on the basis of the transaction log. The snapshot entry is valid as long as it matches a corresponding entry in the source database table. A point in time at which a number of valid ones among the plurality of snapshot entries is maximum is determined. The calculated point in time is returned as an approximate value of a point in time at which the snapshot was created.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.