Use the REGISTER keyword to indicate that a DPICDS entry should be created or updated at the end of a Trial for the segments specified. The Trial utility creates DPICDS segment registration, table, and dictionary records at the STAGE level. If you omit this keyword, the Trial utility does not create or update DPICDS entries.
If you use the REGISTER keyword and specify more than one compression technique or specify ALL as the compression technique, the technique that achieves the best compression is registered. Custom Huffman and Shared Table may produce the same compression percentages because Shared Table uses the same algorithm as Custom Huffman to build the table. If Custom Huffman and Shared Table produce the same compression percentage, Data Packer will register the segment with Shared Table compression.
WarningNote
If you specify REGISTER with TECH(ALL), and no Dictionary or Table name is specified, the Trial does not register the CD or ST techniques. The only way to register the CD or ST techniques is to include a dictionary or table entry in the TECH keyword.
WarningNote
The only way to add a Custom Huffman segment registration entry to your DPICDS is to submit a SYSTEM, DATABASE or SEGMENT control statement with the REGISTER keyword specified. For Shared Tables and Custom Hardware Dictionaries, it is the only way to create table or dictionary entries in the DPICDS.
| Optional keyword valid on the SYSTEM, DATABASE, or SEGMENT control statement. |
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| Enter one or more of the following values: | |
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PERCENTAGE(value) or PCT (value) | Registers the segment with the compression technique that yields the highest compression if that technique achieves the percentage specified or higher. The percentage specified must be between 15 and 85, for example: REG(PCT(60)). | | If the segment is already registered at the RUN level, copies the RUN level record to STAGE and updates the entry with the new information. If the segment is not registered, adds the entry to the DPICDS. This is the default if you code the REGISTER keyword and do not specify any values. | | If the segment is already registered at the RUN level, creates a STAGE level registration entry with the new information. If the segment is not registered, adds the entry to the DPICDS, for example: REG(PCT(70),REPL). |
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