RDF System Management Manual

Installing and Configuring RDF
HP NonStop RDF System Management Manual—524388-003
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Configuring RDF
The default is SLOWMODE off. For a complete discussion of SLOWMODE, see the
description of the SET RECEIVER command in section 8.
To configure an RDF receiver process named $RECV to run as a process pair in CPUs
0 and 2 of the backup system at a priority of 185 with SLOWMODE off, and to have the
RDF image trail file (with a primary extent size of 3000 pages and a secondary extent
size of 3000 pages) reside on the volume $IMAGE, issue the following commands:
]SET RECEIVER ATINDEX 0
]SET RECEIVER PROCESS $RECV
]SET RECEIVER CPUS 0:2
]SET RECEIVER PRIORITY 185
]SET RECEIVER RDFVOLUME $IMAGE
]SET RECEIVER EXTENTS (3000,3000)
]ADD RECEIVER
You cannot start RDF until you have configured a master receiver process.
You can issue ADD RECEIVER commands only when RDF is stopped.
Purger Process
Use SET PURGER and ADD PURGER commands to configure the following purger
parameters:
•
CPUS primary-CPU : backup-CPU
•
PRIORITY
•
PROCESS
•
RETAINCOUNT
•
PURGETIME
The CPUS parameter specifies the processors in the backup system in which the
purger is to run.
The PRIORITY parameter specifies the priority at which the purger will run. You should
set the purger’s priority higher than that of any application’s process and higher than
that of any RDF updater process.
The PROCESS parameter supplies a name for the purger process. You should specify
a meaningful mnemonic such as $PURG. The process name can be any unique valid
process name up to 5 characters, including the $ symbol. However, you cannot specify
HP reserved process names that are of the form $X*, $Y*, or $Z*, in which * is any
alphanumeric string.
The RETAINCOUNT parameter specifies how many of the most recent image trail files
will be retained on disk for each image trail. The default value is 2. For details about
the RETAINCOUNT parameter and triple contingency, see Section 10, Triple
Contingency.