RDF System Management Manual for J-series and H-series RVUs (RDF 1.10)

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 rtd-time
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. Besides the monitor process (and perhaps the extractor),
the display includes only those updaters, if any, whose RTD exceeds the configured updater
RTD warning threshold.
UPDATEROPEN access-mode
specifies the access mode (PROTECTED, PROTECTED OPEN, 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. Before
you start an online dump or a reload operation, you should alter the UPDATEROPEN mode
from PROTECTED to SHARED. After the dump or reload has finished, you should change the
UPDATEROPEN mode back to PROTECTED. See the discussion in Chapter 3 for the issues
involved, including the meaning of PROTECTED OPEN.
To change the configured updater access-mode:
1. Issue a STOP UPDATE command.
2. Issue an ALTER RDF UPDATEROPEN command specifying the desired access mode.
3. Issue a START UPDATE command.
SOFTWARELOC $volume.subvolume
specifies where the RDF software is installed. The default is $SYSTEM.RDF.
NETWORK {ON | OFF}
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 transactions spanning more than one RDF backup database.
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 {ON | OFF}
specifies whether the particular system is the master of the RDF network. Each RDF network has
one, and only one, network master.
When set to OFF (the default value), the particular system is not the network master.
When set to ON, the particular system is the network master of the RDF network. When this
attribute is set to ON, the NETWORK attribute must also be set to ON.
UPDATEREXCEPTION {ON | OFF}
specifies the manner in which exception files are used.
When set to ON (the default value), the updaters log an exception record for each and every
audit record they must undo during a takeover.
When set to OFF, the updaters log exception records only for the first and last audit records
that must be undone (the minimum logging necessary to support Triple Contingency operation).
LOCKSTEPVOL $volume
specifies the primary system disk volume on which the RDF lockstep file
(ZRDFLKSP.control-subvolume) is to be located. The specified volume must be configured
218 Entering RDFCOM Commands