gtpd1m1a | Database Reference |
Depending on your operational schedule, file capture can be done in two
ways:
- Real-time online capture.
- Non-real-time online capture. This has the advantage of limited or
no file interference, and no exception records are written. This method
cannot be used for a continuously operating system.
It is recommended that you preform a capture daily in order to minimize the
data loss if an irrecoverable failure occurs. The optimum time to
capture, from the point of view of file regeneration, is immediately following
file maintenance. In addition to the daily capture, it is recommended
that files are captured:
- Before and after fixed-file reorganization
- Before and after file pool reallocation
- Before major program updates.
Record logging can be used as:
- A complete file recovery means against hardware failure but at a cost of
additional system load and hardware requirement during peak periods of
operation
- A test tool to verify the updating of certain record types during program
modifications or additions
- A means of data collection for additional analysis.
The keypoint capture function is normally used after file capture to obtain
the latest copy of the keypoints.