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How PACLOG works

In normal mode (nonsimulation mode), PACLOG examines the BSDS and the archive history file to identify the archive log data sets that have not yet been processed by PACLOG. It also reads the active log, performing a checkpoint analysis to identify committed data.

For each archive log data set so identified, PACLOG performs the following processing:

  1. Copies the BSDS to the medium that is specified in the job input

  2. Copies the archive log data set to the medium that is specified while performing the filtering that is specified in the job input

  3. Replaces the original archive log with the processed log

  4. Updates the archive history file and copies the replaced version to the medium that is specified in the job input

The following figure illustrates normal mode processing.

PACLOG processing

To keep the original primary and backup archive logs intact and at the same time make additional (processed) copies, or to perform PACLOG trials, you can use PACLOG in simulation mode. In simulation mode, PACLOG examines the BSDS and BMC Software archive history file to identify the archive log data sets that have not yet been processed by PACLOG and then performs a series of tasks that is slightly different from normal mode.

For each archive log so identified, PACLOG performs the following processing:

  1. Copies the BSDS to the medium that is specified in the job input

  2. Copies the archive log data set to the medium that is specified while performing the filtering that is specified in the job input

  3. Updates the archive history file if so specified in the job input

  4. Copies an updated version of the archive history file to the medium that is specified in the job input

  5. Deletes or retains all copies according to the job input specifications, as follows:

    • If deletion was specified, PACLOG deletes all copies created in this operation.

    • If retention was specified, PACLOG retains all copies created in this operation.

For information about the syntax required to specify simulation and about how retained copies are named, see Global options .

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