7.18 Rules and notes

Organization of this section
(1) Rules
(2) Notes

(1) Rules

(2) Notes

(a) Utility execution results

The results of execution of the database structure modification utility can be verified by the following methods:

(b) In the event a HiRDB file system area is corrupted

If the execution of the database structure modification utility is interrupted due to a power failure or the kill command, in some cases the HiRDB file system area can be damaged. If a conflict is detected by executing the pdfls command, use one of the following procedures to perform recovery:

(c) About making backups

Because the database structure modification utility invalidates logs, it is important immediately after you have executed the database structure modification utility to make backup copies of RDAREAs to be processed. If an RDAREA that is processed is placed in error shutdown status and no backup was made, that RDAREA can only be restored to its status before the database structure modification utility was executed (the information updated by the database structure modification utility cannot be restored).

Depending on the operation performed by the database structure modification utility, you might need to synchronize the target RDAREAs with the system RDAREAs and other related RDAREAs during backup processing. For details, see RDAREAs to be backed up together in the HiRDB Version 9 System Operation Guide.