RDF System Management Manual for H-Series RVUs (RDF 1.8)

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.
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.
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.
UPDATEROPEN Parameter
The UPDATEROPEN parameter specifies the access mode (PROTECTED or SHARED) that
updaters use when opening database files. The default is PROTECTED.
Protected access is strongly recommended at all times, except when you specifically want to take
online dumps or do reloads of the backup database with the updaters running. After the dumping
or reloads have finished, you should change the access mode from SHARED back to PROTECTED.
SOFTWARELOC Parameter
The SOFTWARELOC parameter specifies where the RDF software is installed on both the primary
and backup systems. The default is $SYSTEM.RDF.
NETWORK Parameter
The NETWORK parameter specifies whether or not you are configuring an RDF network.
When set to OFF (the default value), RDF takeover operations execute and database consistency
is not guaranteed for user transactions that were replicated over more than one RDF backup
node.
When set to ON, the RDF subsystem guarantees database consistency across multiple RDF backup
systems configured within an RDF network.
When set to ON, you must either have the NETWORKMASTER attribute for the same system
also set to ON or have another system configured as the network master.
NETWORKMASTER Parameter
The NETWORKMASTER parameter specifies whether the particular system is the master of the
RDF network.
When set to OFF (the default value), the particular system is not the network master.
Initializing and Configuring RDF 89