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 SUF (also known as XBM)
- Start and maintain an SUF (also known as XBM) subsystem in your environment
- Have a zIIP available in your environment
Using XBM or SUF
You can specify a particular SUF (also known as XBM) subsystem to use by specifying a value for the XBMID installation or command option.
SUF (also known as XBM) are licensed, installed, and maintained separately from UNLOAD PLUS. You can use either SUF (also known as XBM), depending on the license that you have obtained:
- A license for the full version of the SUF (also known as XBM) product authorizes you to use all features of SUF (also known as XBM).
- A license for SUF (also known as XBM) authorizes you to use only the snapshot and zIIP-processing features of SUF (also known as XBM).
For more information about SUF (also known as XBM), see the SNAPSHOT UPGRADE FEATURE for DB2 documentation.
For information about how to determine zIIP usage, view the Quick course EXTENDED BUFFER MANAGER for DB2 - Measuring zIIP Usage. |
DISABLED
ZIIP DISABLED tells UNLOAD PLUS to not attempt to use zIIP processing.