RECOVERY (edit only)

The RECOVERY command helps you minimize the number of database updates lost due to a system failure.

RECOVERY ON causes File-AID for IMS/ISPF to issue a DL/I checkpoint call after every n database update calls. When a checkpoint call is made, DL/I writes all its changed database buffers, which forces all updated segments to be written to the database datasets.

RECOVERY OFF prevents File-AID for IMS/ISPF from automatically issuing any checkpoint calls. Therefore, DL/I writes its buffers only when they are full.

If you enter the RECOVERY command without any operands, the default is ON and the checkpoint interval n is set to one. If you enter a checkpoint interval, it can range from 1 to 2,147,483,647.

When initially entering the Database Location screen, File-AID for IMS/ISPF sets RECOVERY OFF. RECOVERY remains off throughout the editing session unless you turn it on with the RECOVERY command.

See here for information on how the RECOVERY command is affected by nonkeyed and nonunique segments.

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