Migrating Checkpoint Array Files

The page sizes of segment array might differ between different MCP machine types. Consequently, it might be necessary to migrate the APPLBLD INFO and BLDMEMDB (system) checkpoint array (CPA) files from the machine on which the array was check-pointed to the new machine.

The NGEN28/ABMIGRATE utility can migrate the APPLBLD file (APPL_BLD_nn/ INFO), and the NGEN28/BLDMIGRATE utility can migrate the MEMDB file (system/ SOURCE_FILE/BUILD/MEMDB).

To enable migration of these files, complete the following procedure.

Before commencing this procedure, you should back up the APPLBLD and MEMDB files on each host and for every application or system.

  1. Unload the APPLBLD file from the machine from which it is to be migrated. To do so, log on to CANDE and enter the following commands:

    R $NGEN28/ABMIGRATE;
FILE CPAFILE(TITLE=<UNLOAD INFO CPA filename>);
FILE INFO(TITLE=<*APPL_BLD_NN/INFO filename>);

  2. Copy the unloaded APPLBLD file and load it on the machine to which it is to be migrated. To do so, log on to CANDE and enter the following commands:

    R $NGEN28/ABMIGRATE;SW1;
FILE CPAFILE(TITLE=<UNLOADED INFO CPA filename>);
FILE INFO(TITLE=<*APPL_BLD_NN/INFO filename>);

    During the load process, you are asked to AX OK to confirm the load.

  3. Unload the MEMDB file from the machine from which it is to be migrated. To do so, log on to CANDE and enter the following commands:

    R $NGEN28/BLDMIGRATE;
FILE CPAFILE(TITLE=<UNLOAD MEMDB CPA filename>);
FILE INFO(TITLE= <system/SOURCE_FILE/BUILD/MEMDB filename>);

  4. Copy the unloaded MEMDB file and load it on the machine to which it is to be migrated. To do so, log on to CANDE and enter the following commands:

    R $NGEN28/BLDMIGRATE;SW1;
FILE CPAFILE(TITLE= <UNLOADED MEMDB CPA filename>);
FILE INFO(TITLE= <system/SOURCE_FILE/BUILD/MEMDB filename>);

    During the load process, you are asked to AX OK to confirm the load.

  5. Repeat steps 3 and 4 for each application or applications to be migrated.