8.2.3 Designing HiRDB file system areas for work table files

This section discusses the design considerations for HiRDB file system areas in which work table files are to be created.

Organization of this subsection
(1) Design for improved reliability
(2) Checking the peak capacity

(1) Design for improved reliability

The amount of space required for a HiRDB file system area for work table files must be greater than the total size of the work table files to be created in the area. If you specify the -a option with the pdfmkfs command, the HiRDB file system area can be automatically extended. We recommend specifying the -a option, since the HiRDB file system area will be extended automatically when the total size of the work table files reaches the size of the HiRDB file system area.#

For details about the sizes of work table files, see Chapter 18. Determining Work Table File Size.

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To reduce the amount of disk space that the HiRDB file system area for work table files occupies when HiRDB is re-started, before restarting HiRDB, execute the pdfmkfs command and then re-initialize the HiRDB file system area for work table files.

(2) Checking the peak capacity

The peak capacity of a HiRDB file system area for work table files can be obtained by entering the following command:

pdfstatfs -d name-of-HiRDB-file-system-area-for-work-tables
-d
Specifies that the maximum utilization value for the allocated HiRDB file system area is to be displayed. The peak capacity display that is output is this value. The maximum utilization value is cleared by entering the following pdfstatfs command:
pdfstatfs -c name-of-HiRDB-file-system-area-for-work-table
-c
Specifies that the maximum utilization value for the allocated HiRDB file system area is to be cleared to 0.