Typical benefits of PSSR
Physical Sequence Sort for Reload sorts an unloaded database data set that is produced for an HDAM database to reduce the elapsed time that is required to reload the database. It also generates reports that help you conduct performance and tuning analysis.
The PSSR utility offers the following benefits:
Reduces elapsed time to reload a database
Helps prevent cascading
PSSR helps to avoid
the cascading of root segments during reorganization. It does so by
loading some database records at the end of the reload, instead of
loading them in their normal physical sequence.
Important: If you reload a database by using IMS™ High
Performance Load for z/OS® Version
2 Release 1, you cannot use PSSR to prevent cascading. To prevent
cascading and avoid degradation of performance in reloading, it is
recommended that you use the SORT=YES and the SEARCH=-nnn parameter
instead of using PSSR.
Helps conduct performance and tuning analysis
PSSR
helps you conduct performance and tuning analysis by generating the
following reports: