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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Configuring RDF
Receiver Process
Use SET RECEIVER and ADD RECEIVER commands to configure the following
receiver parameters:
•
ATINDEX
•
CPUS primary-CPU : backup-CPU
•
EXTENTS
•
PRIORITY
•
PROCESS
•
RDFVOLUME
•
SLOWMODE
The CPUS option value specifies the processors in the backup system in which the
receiver is to run.
The EXTENTS option value only applies to the master receiver. It specifies the size of
the primary and secondary extents for all image trail files on all image trails.
The PRIORITY option value specifies the priority at which the receiver will run. You
should set the receiver’s priority higher than that of any application’s process and
higher than that of any RDF updater process.
The PROCESS option value supplies a name for the receiver process. You should
specify a meaningful mnemonic such as $RECV. 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 RDFVOLUME parameter applies only to the master receiver. It specifies which
volume on the backup system will contain the receiver’s master image trail. The file
naming convention for image trail files is $volume.control-subvolume.AAnnnnnn,
where n is a digit. For example, the first image file is named $volume.control-
subvolume.AA000001. You cannot specify the subvolume name because that name
is controlled by RDF.
The SLOWMODE option value controls the frequency with which the receiver updates
its context records. With SLOWMODE on, the receiver updates its context records
after processing each extractor message buffer; this enables the updaters to have the
lowest possible RTD value at all times. The SLOWMODE option is intended for use
when customers have implemented their own pseudo-lockstepping environments. 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