ZIIP

UNLOAD PLUS can use enclave service request blocks (SRBs) to enable zIIP processing automatically while running jobs. Using zIIP processing can reduce the overall CPU time for UNLOAD PLUS jobs.

Specifying the default

You can specify the default for the ZIIP command option in your installation options module by using the ZIIP installation option. UNLOAD PLUS was shipped with a default value of ENABLED for this option. The ZIIP command option overrides the default that is in the installation options module.

ENABLED

ZIIP ENABLED tells UNLOAD PLUS to attempt to offload eligible processing to an available zIIP. If the zIIP is busy or not available, normal processing continues on a general-purpose processor.

To enable and use zIIP processing with UNLOAD PLUS, you must meet the following requirements:

• Have an installed authorized version of XBM or SUF
• Start and maintain an XBM subsystem in your environment
• Have a zIIP available in your environment

Using XBM or SUF

You can specify a particular XBM subsystem to use by specifying a value for the XBMID installation or command option.

XBM and SUF are licensed, installed, and maintained separately from UNLOAD PLUS. You can use either XBM or SUF, depending on the license that you have obtained:

• A license for the full version of the XBM product authorizes you to use all features of XBM.
• A license for SUF authorizes you to use only the snapshot and zIIP-processing features of XBM.

For more information about XBM and SUF, see the SNAPSHOT UPGRADE FEATURE for DB2 documentation.

DISABLED

ZIIP DISABLED tells UNLOAD PLUS to not attempt to use zIIP processing.