RDF/IMP and IMPX System Management Manual (RDF 1.4+)

Installing and Configuring RDF
HP NonStop RDF/IMP and IMPX System Management Manual—524388-001
3-20
Configuring RDF
UPDATERDELAY Parameter
The UPDATERDELAY parameter specifies how many seconds (from 1 to 10) the
updater processes should delay upon reaching the logical EOF in the image trail
before attempting a new read operation. The default is 10 seconds.
This parameter should be left at the default value unless you have a very specific
reason for lowering it; lowering the UPDATERDELAY value could adversely impact
updater performance.
UPDATERRTDWARNING Parameter
The UPDATERRTDWARNING parameter specifies the RTD warning threshold (in
seconds, 0 or greater) for all configured updaters. The default is 60 seconds.
This threshold is used by the STATUS RTDWARNING command to determine which
updaters, if any, are to be included in its display. The display includes the monitor
process and only those RDF processes (extractor or updaters) whose RTD exceeds
their configured RTD warning threshold.
UPDATERTXTIME Parameter
The UPDATERTXTIME parameter specifies the maximum transaction duration in
seconds (from 10 to 300) for all updater processes. The default is 60 seconds.
RDF updaters operate in transaction mode. Updater transactions are essentially long-
running transactions that pin audit trail files on the backup system and can affect the
duration of backout operations if an updater transaction aborts for any reason.
The default value is recommended for RDF environments with heavy updater activity
(aggregate updater throughput greater than 300 kb/second). Raising the tx-time in
such environments could adversely affect TMF performance on the backup system.
In RDF environments with low to moderate updater activity and where no other
transaction activity is occurring on the backup system, you could raise the tx-time
without affecting TMF performance on the backup system.
Setting Individual Process Parameters
Having set the global parameters, you are now ready to set the parameters that apply
to individual RDF processes: the monitor, extractor, receiver, purger, and updater
processes.
Monitor Process
Use SET MONITOR and ADD MONITOR commands to configure the following
monitor parameters:
•
CPUS primary-CPU : backup-CPU
•
PRIORITY