HiRDB creates audit trail files automatically in the HiRDB file system area for audit trail files. The first time an audit trail file is created, it becomes the first generation, followed by the second generation, the third generation, and so on. Figure 22-5 shows the procedure for creating audit trail files.
Figure 22-5 Audit trail file creation
The maximum number of audit trail files that can be created in the HiRDB file system area is specified in the pd_aud_max_generation_num operand. However, if the value of the pdfmkfs command's -l option is smaller than the value of the pd_aud_max_generation_num operand, the value of the -l option becomes the maximum. Also, if there becomes insufficient space in the HiRDB file system area, it will not be possible to create as many audit trail files as provided for by the specification of the pd_aud_max_generation_num operand.
The audit trail files are named according to the following convention:
pdaudunit-identifier001-200.aud
If files other than audit trail files are created in the HiRDB file system area for audit trail files, they must not be files whose names will be inconsistent with these naming conventions.