enableB2 does not survive PROREST

Area Level Alternate Buffer Pool assignments are lost after PROBKUP/PROREST.
Object Level -B2 assignments survive a backup/restore.
Area Level -B2 assignments are no longer in the restored target database

Use-Case:
A production database is restored and started with -B2 
That shared-memory is unused until Areas are re-assigned to the Alternate Buffer Pool Area Level offline

PROREST 

• Does not keep AREA level assignment of SOURCE 
• Does keep TARGET AREA level assignment
• Does keep SOURCE Object level assignment
• Does not keep TARGET Object level assignment

SOURCE == the database against which the backup is taken
TARGET == the database that is restored from the source backup

PROCOPY/PRODB does keep AREA (and object) level assignment of SOURCE database.

Alternate Buffer Pool assignment:

• At the Object Level is stored in _StorageObject._Object-attrib
• At the Area Level is stored in _Area._Area-attrib.

PROREST will restore:

1. Over an existing database's structure, or
2. Use the specified target structure (.st) file when it exists to restore into, or otherwise
3. Will generate a new target .st file based on source database control area information in the backup volume and then use that .st file

In Cases 2 and 3, the _Area records for the target database are created based on the restore structure. As a consequence, the _Area-attrib values are lost because these values are not stored in the structure file. 
 

An Enhancement in OpenEdge 12.2 has been implemented, to store the area-level buffer assignment in the backup header which is used to during the restore. PROREST persists both area and object level buffer-pool assignment of the source database in the restored target.

Prior to OpenEdge 12.2: When restoring a database where Alternate Buffer Pool assignments are at the Area Level (enableB2), re-assign areas after restoring the database with PROREST before starting the database with -B2. These commands can be added to the restore script for example.
 

Progress Articles: 

What is the Alternate Buffer Pool?   
 How to query if an Object or Area is assigned to the Alternate Buffer Pool (-B2)