Using IPL levels

IPL levels are levels of objects in a dependency structure for starting and stopping objects. You can use IPL levels to specify a controlled, step-by-step IPL or a system shutdown process. You can give IPL levels names (such as BASIC, NETWORK, DATABASE, and ONLINES), and associate objects with each level that you specify.

We recommend that you use IPL levels if you are doing maintenance, and need only a part of the system to run. You can also use IPL levels for disaster recovery sites, where only part of the system is running. After you restore the system, you can start new groups of objects until you have restored all your data sets and files. 

When using IPL levels, you can pause system startup or shutdown however you want. Your predefined IPL levels help avoid human error without the need for any custom automation. 

Related topics

How-to-start-TOM

IPL-levels-parameters-and-setup

Controlled-starting-of-objects-during-IPL-with-IPLLEVEL

For more information about controlled starting of objects during an IPL with IPLLEVEL, see Controlled-starting-of-objects-during-IPL-with-IPLLEVEL.

 

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