Receiver Process - HP NonStop RDF J-series RVUs Management Manual

To configure an RDF extractor process named $EXT to run as a process pair in CPUs 5 and 3 of
the primary system, at a priority of 185, with an RTD warning threshold of 360 seconds, issue
the following commands:
]SET EXTRACTOR ATINDEX 0
]SET EXTRACTOR PROCESS $EXT
]SET EXTRACTOR CPUS 5:3
]SET EXTRACTOR PRIORITY 185
]SET EXTRACTOR RTDWARNING 60
]ADD EXTRACTOR
You can issue ADD EXTRACTOR commands only when RDF is stopped.

Receiver Process

Use SET RECEIVER and ADD RECEIVER commands to configure the following receiver attributes:
• ATINDEX
• CPUS primary-CPU : backup-CPU
• PRIORITY
• PROCESS
• RDFVOLUME
• EXTENTS
• FASTUPDATEMODE
The ATINDEX attribute specifies an integer value identifying a configured TMF audit trail on
the primary system. 0 specifies the MAT. 1 through 15 specify auxiliary audit trails AUX01
through AUX15. The default is 0. For each configured extractor, there must be a corresponding
receiver with the same ATINDEX value. For information about protecting auxiliary audit trails,
see Chapter 13 (page 291).
The CPUS attribute specifies the processors in the backup system in which the receiver is to run.
The PRIORITY attribute 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 attribute 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 attribute 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 EXTENTS attribute 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 FASTUPDATEMODE value controls the frequency with which the receiver writes to the
image trails and makes image trail data available to the updaters. With FASTUPDATEMODE
OFF, the receiver buffers the audit sent by the extractor and writes those buffers out to the image
trails at the most convenient time. This ensures that RDF can achieve the highest possible
extractor-to-receiver throughput, but it does delay the updaters in how quickly they are allowed
to read and apply the audit to the backup database. One can typically observe updater RTD
times in the range of 1-20 seconds, although it may only take an updater a fraction of one second
to apply 20 seconds worth audit.
With FASTUPDATEMODE ON, as a receiver receives an extractor message, it buffers all the
audit sent in that message by the extractor, writes those buffers immediately to the image trails,
and then makes that data immediately available to the updaters. Depending on the value of the
Initializing and Configuring RDF 93