RDF System Management Manual

Entering RDFCOM Commands
HP NonStop RDF System Management Manual—524388-003
8-66
Command Overview
just begun reading file AA000013. Also assume that there are no long-running
transactions that span from file AA000010 to file AA000013. Files AA000010 through
AA000012 might no longer needed, but, because the RETAINCOUNT is set to three,
the purger process can only purge AA000010 (it must keep AA000011 and AA000012
on disk). Thus, as long as the RTD times of the extractors on the two backup systems
are less than 24 hours apart, the triple contingency protocol will work successfully.
Similarly, if you believe the two receiver processes will never be more than 36 hours
apart in their RDF processing and your image trail file sizes are such that
approximately 20 rollovers occur every 24 hours, then you should set the
RETAINCOUNT to 31 on both backup systems.
Where Issued
Primary system only.
Security Restrictions
None.
RDF State Requirements
None.
Usage Guidelines
The SET PURGER command enters the parameter values specified for the purger in
this command into the RDF configuration table in memory. This table serves as an
input buffer only, and so these values do not affect the subsystem until they are applied
to the RDF configuration file with the ADD command.
Example
To configure a purger process named $PRG to run in CPUs 0 and 1 with a
RETAINCOUNT of 8, issue the following commands:
]SET PURGER PROCESS $PRG
]SET PURGER CPUS 0:1
]SET PURGER RETAINCOUNT 8
]ADD PURGER
By default, in this example the purger process will run at a priority of 165 and the
purger purgetime is set to 60 minutes..