Considerations when migrating to 64-bit mode

Nonstop Database, HiRDB Version 9 Installation and Design Guide

1.7.1 Considerations when migrating to 64-bit mode

Organization of this subsection: (1) Incompatible files; (2) Operands with altered default values; (3) Differences in memory requirements; (4) Differences in the UOC interface

(1) Incompatible files

Files that were used by 32-bit mode HiRDB can generally be used by 64-bit mode HiRDB. However, the following files are not compatible with 64-bit mode HiRDB and cannot be used.

Backup files
HiRDB files that consist of a master directory RDAREA and a data directory RDAREA

(2) Operands with altered default values

The default values of some HiRDB system definition operands change when HiRDB is migrated from the 32-bit mode to the 64-bit mode. Check the changes in Operands with different default values in 32-bit and 64-bit mode in the manual HiRDB Version 9 System Definition.

(3) Differences in memory requirements

When HiRDB is migrated from 32-bit mode to 64-bit mode, more memory is required. For details about calculating memory requirements, see Chapter 15. Storage Requirements for HiRDB.

(4) Differences in the UOC interface

When HiRDB is migrated to 64-bit mode, the UOC interface changes for the database creation utility (pdload) and the database reorganization utility (pdrorg). This means that the UOC must be re-created. For details about the UOC interface, see the manual HiRDB Version 9 Command Reference.