Unloading and Reloading a DEDB

This section provides information on the capabilities, setup, and use of the unload and reload functions that are provided by Fast Path Reorg/EP. These functions let you unload a DEDB into any of several file formats, and reload from any of the file formats to a DEDB.

This section contains the following topics:

• Unload and reload function overview
• Preparing for an unload and reload
• Unload and reload function restrictions
• Unload function inputs and outputs
• DBRC considerations for Unloading and Reloading a DEDB
• UNLOAD command keywords and subcommands
• Specifying input and output for Unloading and Reloading a DEDB
• Allocating input area data sets for Unloading and Reloading a DEDB
• Allocating output unload data sets
• Unloading a DEDB by using a generalized randomizer
• Controlling segment expansion
• Controlling segment compression for Unloading and Reloading a DEDB
• Selecting SDEP processing method for Unloading and Reloading a DEDB
• Controlling subset pointer retention for unloading and reloading a DEDB
• Controlling the unload file format
• Selecting database segments for input
• Changing segment contents for Unloading and Reloading a DEDB
• Processing considerations for randomization of root segments to unprocessed areas - Unloading and Reloading a DEDB
• Samples of INCLUDE EXCLUDE and OUTPUT subcommands
• Controlling error tolerance
• Making an image copy during an unload
• Enhancing unload function performance
• Reload function inputs and outputs
• Reload DBRC considerations
• RELOAD command keywords and subcommands
• Specifying input and output areas for Unloading and Reloading a DEDB
• Allocating input area data set for Unloading and Reloading a DEDB
• Allocating output area data sets for Unloading and Reloading a DEDB
• Reloading an area from multiple input files
• Controlling free space in IOVF for Unloading and Reloading a DEDB
• Placing segments with load control for Unloading and Reloading a DEDB
• Controlling segment expansion for Unloading and Reloading a DEDB
• Controlling the segment compression
• Selecting the SDEP processing method
• Selecting the database segments for input
• Changing the segment contents
• Processing considerations for randomization of the root segments to unprocessed areas
• Handling exceptions
• Rebuilding indexes during reload
• Analyzing the DEDB during reload
• Making an image copy during reload
• Enhancing performance of the RELOAD function
• UNLOAD and RELOAD program extensions
• Sample UNLOAD and RELOAD command scenarios