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

These are the only configuration attributes that can be altered while RDF is running. To change
any other configuration attributes, you must first stop RDF or UPDATING as directed in “Restarting
RDF” (page 125).
To change any of the attribute values listed, you start RDFCOM and use the ALTER command.
ALTER is a restricted command; it can be issued only by members of the super ID group. See the
description of the ALTER command in Chapter 8 (page 175).
Process Priority
All configured RDF processes should run at a priority greater than that of any application process.
Furthermore, the RDF processes should run at priorities relative to one another:
• On the primary system, the monitor and extractor processes can run at the same priority but
it is recommended that you set the extractor’s priority slightly lower than that of the monitor.
• On the backup system, the receiver process should run at a higher priority than any updater
process.
The STATUS RDF display shows the priority at which each RDF process is running. Suppose this
display indicates that the monitor currently runs at a priority of 165. To change its priority to 170,
use the ALTER command:
]ALTER MONITOR PRIORITY 170
EMS Logs (Collectors)
In an RDF configuration, two EMS logs (collectors) exist: one at the primary system and the other
at the backup system. The log on the primary system is used by the monitor, RDFCOM, and extractor
and RDFNET processes. The log on the backup system is used by the receiver, updater, and purger
processes.
To redirect messages from the current EMS log to the log named $EMSC (on the control subvolume
CHICAGO), enter:
]ALTER RDF LOGFILE $EMSC
The specified collector must reside on the local system. For example, if you are in an RDFCOM
session on the system \SANFRAN, you cannot specify something like \CHICAGO.$EMSC as the
log.
For more information about the EMS log, see Chapter 1 (page 22), Chapter 3 (page 58), Chapter 8
(page 175), and Chapter 9 (page 254).
INCLUDE – Modify INCLUDE clauses
Specifies what file(s) on the primary system data volume are to be replicated by the Updater process
on the backup system. You can perform the online modification of the INCLUDE clause using the
ALTER VOLUME command. The command only supports inclusion of files. Wildcards in file names
are also not supported by the command.
EXCLUDE – Modify EXCLUDE clauses
Specifies what file(s) on the primary system data volume are not to be replicated by the updater
process on the backup system. You can perform the online modification of the EXCLUDE clause
using the ALTER VOLUME command. As with INCLUDE, the command only supports exclusion of
files. Wildcards in file names are also not supported by the command.
RETAINCOUNT
The RETAINCOUNT purger process configuration attribute specifies how many image trail files
must be retained on disk for each image trail.
106 Operating and Monitoring RDF