Checkpoints for BMC AMI Recover restart

Two installation options, CHECKPT and CHECKINT, determine when checkpoints are taken for BMC AMI Recover jobs. In addition, you can override the CHECKINT installation option at run time by using the BMC AMI Recover OPTIONS command with the CHECKINT keyword.

Checkpoint installation options

You can specify the CHECKPT installation option to take no checkpoints, or to take checkpoints at the end of each phase.

When you specify checkpoints to be taken, you can prevent taking unnecessary checkpoints by specifying a value for the CHECKINT (checkpoint interval) installation option, which specifies the minimum number of minutes that must elapse before the next checkpoint is taken. To decide on values for CHECKPT and CHECKINT, you must balance the cost of taking checkpoints against the time lost redoing work when an BMC AMI Recover execution fails and must be restarted. For more information about these installation options, see BMC AMI Recover installation options.

Checkpoint override parameter

At run time, you can override the value for the CHECKPT installation option by specifying a value for the checkpoint override parameter in your BMC AMI Recover JCL.

Use the following guidelines:

• Specify CHECKPT(NO) (no check points) for short recoveries that you do not mind rerunning when necessary.

• Specify CHECKPT(PHASE) (checkpoints at the end of each phase) for longer running jobs when it becomes costly to rerun the entire job.

As with the CHECKPT installation option, the setting of CHECKINT controls the frequency of the taking of checkpoints when you use the checkpoint override parameter.

For more information about the checkpoint override parameter, see Checkpoint override parameter (checkPt).