Managing the historical database

This topic covers the maintenance tasks you perform to control historical data and manage the historical database that is used by a PAS.

To control the historical database for the current PAS, use the tasks in the following table.

Task	View or Command	See
Understand how the historical database is structured and how data is recorded to the historical database	Not applicable	Understanding the historical database
View the status of all historical data sets	DSLIST view	Viewing the status of historical data sets (DSLIST view)
Understand what the status of a historical data set means for recording or displaying data	Online Help for the Status field on the DSLIST view	Understanding the status of a historical data set
Change a data set's recording eligibility	O line command	Changing recording eligibility
Select the next data set for recording	F line command	Selecting the next data set for recording
Restrict read and write access to a data set	Q line command	Restricting read and write access to the active data set
Reinstate read and write access to a data set	U line command	Reinstating read and write access to a quiesced data set
Close a data set	F or Q line command	Closing a data set
Empty a data set	R line command	Emptying a historical data set
Allocate a historical data set to the PAS	ADD primary command or PAS started task procedure	Adding a historical data set dynamically or Allocating historical data sets to the historical database
Permanently save changes made to historical data sets	SAVE primary command	Saving dynamic changes to the historical database
Deallocate a historical data set	D line command	Deallocating a historical data set
Move data to and from the archive	REPRO or EXPORT function in IDCAMS	Archiving and retrieving historical data

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