Changing DEDB structure in place
This section provides information on the capabilities, setup, and use of the database change function that is provided by the Fast Path Reorg/EP. This function lets you change the structure of a DEDB without unload/reload processing.
This section contains the following topics:
- Change function overview
- Preparing for a DEDB change
- Change function restrictions
- Change function inputs and outputs
- DBRC considerations for changing DEDB structure in place
- CHANGE command keywords and subcommands
- Specifying input and output
- Changing a DEDB by using a generalized randomizer
- Allocating input area data sets
- Allocating output area data sets
- Controlling free space in IOVF
- Placing segments with load control
- Controlling segment compression
- Selecting SDEP processing method
- Controlling subset pointer retention when changing the DEDB structure
- Selecting database segments
- Changing segment contents
- Samples of INCLUDE, EXCLUDE, and OUTPUT subcommands
- Processing considerations for randomization of root segments to unprocessed areas
- Rebuilding indexes during DEDB change
- Analyzing the DEDB during change
- Making an image copy during DEDB change
- Enhancing performance of the CHANGE function
- Sample CHANGE command scenarios
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