Abstract: A method, apparatus, and article of manufacture for dynamic change management in an extended remote copy system. A primary data mover monitors changes made to a primary data volume resulting from write I/O operations, wherein the changes are reflected in a data structure maintained by the primary data mover. The primary data mover performs a multi-level analysis on the data structure to discard a portion of the changes therein, so that the changes that have been applied to a secondary data volume are discarded from the data structure and the changes that have not been applied to the secondary data volume are maintained in the data structure.
Type:
Grant
Filed:
December 18, 1997
Date of Patent:
July 11, 2000
Assignee:
International Business Machines Corporation
Inventors:
Robert Nelson Crockett, Ronald Maynard Kern, Gregory Edward McBride