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

Operating and Monitoring RDF
HP NonStop RDF/IMP and IMPX System Management Manual—524388-001
4-23
Reading Log Messages
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 as follows:
]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 sections 1, 3, 8, and 9.
Reading Log Messages
RDF messages are sent to the EMS log (collector) specified during RDF configuration.
If RDF encounters an error while attempting to open or send a message to the
configured log, RDF takes the following actions:
1. RDF writes either of the following messages to the local $0 process:
"705 File Open Error error# filename"
"700 File System Error error# filename"
2. RDF then closes the log (if it is open). The log remains as configured.
The next time RDF needs to write a message to the log, RDF attempts to reopen the
configured log. If the error condition persists, RDF repeats the steps just described.
Examining RDF Messages
Previous RDF products directed their messages to a log device and a log file.
RDF/IMP and IMPX, however, direct their command, event, warning, and error
messages to an EMS collector in the form of fully-tokenized messages.
You can peruse messages in the EMS log on your terminal screen by using Viewpoint
or whatever other tool you normally use for monitoring $0. Note that when doing that,
however, you are dealing with the entire EMS log (not just RDF messages).