RDF/IMP, IMPX, and ZLT System Management Manual

Installing and Configuring RDF
HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002
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Stopping the Software
creation default for NonStop SQL/MP tables and indexes. Although not
required by RDF, audit compression will enhance RDF performance.
Stopping the Software
After you stop all applications protected by TMF, stop TMF itself by issuing a STOP
TMF command through the TMFCOM interactive interface. (You only need to stop your
applications and TMF if you are going to use the TIMESTAMP parameter of the INIT
RDF command or if you are going to omit the timestamp parameter in all forms). For
information about issuing this and other TMFCOM commands, see the HP NonStop
TMF Reference Manual.
Preparing the Tables and Files
Now prepare your tables and files.
Separating NonStop SQL/MP Tables
It is recommended that you avoid registering NonStop SQL/MP tables protected by
RDF in the same catalogs as tables that are not protected by RDF. Separating
protected tables from unprotected ones simplifies the comparison of primary system
catalogs with backup system catalogs.
Compressing Audit Data for Tables and Files
Although not required by RDF, using the AUDITCOMPRESS file attribute will enhance
RDF performance. TMF compresses the audit data generated for NonStop SQL/MP
tables and Enscribe files for which AUDITCOMPRESS is on. For applications involving
updates of only a few bytes to large existing rows or records, this audit compression
greatly reduces both the amount of audit information the extractor must read and send
to the receiver and the corresponding amount of RDF traffic on the communications
line.
For NonStop SQL/MP tables and indexes, AUDITCOMPRESS is the default. If the
value has been changed to NO AUDITCOMPRESS for a table, you can use an ALTER
TABLE command, entered through the NonStop SQL/MP Conversational Interface
(SQLCI), to reset the default value:
ALTER TABLE table-name AUDITCOMPRESS;
To set the AUDITCOMPRESS attribute for an Enscribe file, use the File Utility Program
(FUP) to enter an ALTER command:
FUP ALTER filename, AUDITCOMPRESS