RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Additional Reference Information
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
B-10
RDF File Codes
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RDFLOCK file
The RDFLOCK file is an unstructured, semaphore lock file that exists only to
protect RDFCOM from performing multiple critical operations at the same time. A
semaphore lock is the software mechanism that prevents other processes from
executing certain functions until the process that initiated the semaphore lock has
finished its processing. For example, if you issue any one of the following
RDFCOM commands, RDFCOM tries to lock the RDFLOCK file:
COPYAUDIT
INITIALIZE RDF
START RDF
STOP RDF
START UPDATE
STOP UPDATE
TAKEOVER
If the RDFLOCK file is not already locked, RDFCOM locks this file and executes
the critical type of operation. If another RDFCOM user tries to execute a critical
type of operation and RDFCOM finds the RDFLOCK file already locked,
RDFCOM issues the following message:
Another RDFCOM is performing a CRITICAL operation.
RDF File Codes
RDF image trail file code = 720
RDF configuration file code = 721
RDF primary context file code = 722
RDF remote context file code = 723