This section describes the procedure for upgrading HiRDB.
Upgrading refers to installing a later version or revision of HiRDB (for example, when VV or RR in the VV-RR-ZZ format HiRDB version number increases).
When upgrading a HiRDB/Parallel Server, upgrade all units constituting the HiRDB/Parallel Server so that they have the same version of HiRDB.