Tuning Performance › VSAM Data Set Tuning › Deferred Write Capabilities

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Deferred Write Capabilities

Deferred write capabilities let you defer the updating of data sets so there are fewer I/O requests. Weigh the advantages of using this facility against the possibility of losing data in the event of a system failure.

To allow a data set to have deferred write capabilities, specify the DEFER operand on the UDBCTL OPEN command, or VSAM options in a Customizer parameter group.

Note: For more information about the UDBCTL command, see the online help.