PACLOG processing only (PPO) mode

If you do not run the BMC DATA ACCELERATOR non-VSAM component, you can run

PACLOG

in PPO mode. PPO mode provides the following benefits:

Eliminates monitoring of the following SVCs:
- ATTACH
- LINK
- BLDL/FIND
- STOW
Eliminates interception of SORT and IEBCOPY
Eliminates I/O to any REGISET defined in the BCSS procedure
Allows you to share the BCSS subsystem with other BMC products that use a REGISET (for example, the AES product family) without incurring the overhead due to the presence of the REGISET

PPO commands

The following sections describe the OS/390 commands that you can use in PPO mode.

Running in PPO mode

To run PACLOG in PPO mode each time the BCSS is started, insert the following command as the last line in the data set for BCSS commands:

DAC PPO ON

Warning

Do not issue the DAC PPO ON command if you are running the DATA ACCELERATOR non-VSAM product. If you issue that command, any attempt to open a compressed data set fails and the following messages are issued:

BMC32740E OPEN failed under PPO because data set profile not created by API

BMC32402I DDNAME( ddName) DSNAME( dsName)

The following message may be issued if the IBM utility IEBCOPY is run and the output PDS has been compressed:

IEB127I RECFM INCOMPATIBLE

The following is an example of the PACLOG BCSS commands.

Important

The fifth line applies only if you are running in PPO mode. The sixth line applies only when you shut down the started tasks.

REINIT DAC
DAC NONVSAM ENABLE
DAC NONVSAM CL LOCAL
DAC STATUS
DAC PPO ON
DAC PPO SHUTDOWN

Shutting down the started tasks

Use the command DAC PPO SHUTDOWN to terminate the started tasks when you are not running any other BMC products that require the BCSS.

To issue the command from an OS/390 console, use the following command, where the variable bcssid is the one- to four-character BCSS subsystem ID:

bcssId DAC PPO SHUTDOWN

Important

You must restart the BCSS if you wish to enter any further commands. For more information, see Restarting PPO mode.

To terminate the started tasks automatically after the subsystems have completed initialization, insert the following command in the data set for BCSS commands:

DAC PPO SHUTDOWN

Warning

Do not issue the DAC PPO SHUTDOWN command if you are sharing the BCSS subsystem with any other BMC product. Shutting down the BCSS started task that is used for the AES or other products causes failures in those products.

Reinstating full compression services

If you want to disable PPO mode and reinstate full compression services, issue the following commands from the OS/390 console:

START BCSS

Wait for the BCSS initialization to complete, then issue the following commands, where the variable bcssId is the one- to four-character BCSS subsystem ID:

bcssId DAC PPO OFF
bcssId DAC NONVSAM ENABLE ATTACH
bcssId DAC NONVSAM ENABLE LINK

Restarting PPO mode

If you have stopped PPO mode, use the following command to restart PPO mode.

DAC PPO ON

To issue the command from an OS/390 console, use the following command, where the variable bcssId is the one- to four-character BCSS subsystem ID:

bcssId DAC PPO ON