The initial load of the target datastores and the methods employed to achieve full synchronization of the source and target are an easily overlooked but important and significant activity. The same methods can be used as needed to refresh all or a subset of the normal CDC/Apply targets. Various methods should be considered based on all applicable factors including performance, ease of configuration and operational impact:
- The Keyed File Compare Capture determines the differences between two files of the same format and writes the Change data including both before and after images to a z/OS System LogStream. It is the perfect companion to the VSAM Capture for performing Initial loads and target refreshes.