×

Method and System of Database Management for Replica Database

  • US 20090049107A1
  • Filed: 09/26/2008
  • Published: 02/19/2009
  • Est. Priority Date: 06/26/2001
  • Status: Abandoned Application
First Claim
Patent Images

1. In a database management system, a data processing unit for handling a plurality of transactions in parallel, comprising:

  • a plurality of storage areas for storing data;

    a copy mechanism for copying data from a data cache into the plurality of storage areas;

    a data synchronizer; and

    a data synchronizer canceller,wherein the data synchronizer canceller identifies first transactions that are in progress at a first time, writes data on the data cache written by the first transactions into each of at least two storage areas when said each first transaction ends, and delays writing of data generated by second transactions which start after the first time to the storage areas until a second time,wherein the data synchronizer canceller stops the data synchronizer at the second time which is after all of the first transactions have ended and restarts writing the delayed data and new data generated by the second transactions to one of the at least two storage areas,wherein at least one of the at least two storage areas is separated from a control of the copy mechanism in response to a separate storage instruction during the period between the time when all first transactions have ended and the second time.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×