RDF System Management Manual for J-series and H-series RVUs (RDF Update 13)

UPDATERNSASUSPEND {ON | OFF}
Specifies whether Updaters will shut down completely or suspend during a NonStop Shared
Access Operation on the primary when they encounter a Stop-RDF-Updater record.
When this attribute is OFF (the default value), Updater processes on the backup system will
shut down completely after completing their current transaction during a NonStop Shared
Access DDL operation.
When this attribute is ON, Updater processes on the backup system will suspend after
completing their current transaction during a NonStop Shared Access DDL operation.
UPDATERFOPENTHRESHOLD threshold-value
Enables RDF users to set a threshold limit on the number of files that can be opened by a RDF
Updater process. This attribute can be set using SET RDF and modified using ALTER RDF, only
when RDF is intialized.
The default value of this attribute is 2400. When RDF Updaters exceed this value for the number
of files open and need to open a new file, they will emit EMS Event 933 and continue normal
processing.
UPDATERTXTIME tx-time
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 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.
RDFCOM Commands 221