Three processes create temporary work areas on the disk:
For recovery purposes, Essbase maintains a data recovery area on the disk. The size of this area increases until the database is restructured.
During restructuring, Essbase uses a restructuring work area on the disk.
During upgrade from prior releases of Essbase, for recovery purposes, Essbase creates a copy of the database in a migration work area.
To create these temporary work areas, Essbase may require disk space equal to the size of the entire database. Restructuring and migration need additional work space the size of the outline. Because none of these activities occur simultaneously, a single allocation can represent all three requirements.
To calculate the size of a work area used for restructuring, migration, and recovery, calculate the sum of the sizes of the following database components from Table 247, Worksheet: Estimate of Disk Requirements for a Database:
Use the following formula to calculate the size of the work area:
work area = size of compressed data files + size of index files + fragmentation allowance + outline size
Write the result of this calculation to the cell labeled DI in Table 247, Worksheet: Estimate of Disk Requirements for a Database.