RDF/IMP, IMPX, and ZLT System Management Manual

Network Transactions

HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002

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Non Network Master Subsystem Initialization

If you reconfigure the RDF subsystem of a non network master:

1. The network configuration record must point to the network master of the RDF

network.

2. You must ensure that the updater responsible for the PNETTXVOLUME is also

configured to the same image trail as that listed in the network master’s network

configuration record. Otherwise, validation will fail and you will be unable to start

the newly configured subsystem.

RDF Networks and ABORT or STOP RDF

Operations

If no network transactions are active, you can stop RDF on any subsystem at any time

without affecting the other systems in an RDF network. The same is true with regard

to an RDF monitor process aborting its RDF subsystem.

There is, however, one exceptional situation. The RDFNET process runs on the

network master’s primary system. For every primary system in the RDF network, the

RDFNET process maintains a special file on its PNETTXVOLUME volume. If the

communications line to one of those primary systems is down, and you then issue a

STOP RDF command on the network master’s primary system, the STOP RDF

command could appear to hang. The reason for this is that the RDFNET process

might be trying to open a file for the system whose path is down. In such a case, the

RDFNET process waits until either the line comes back up or the Expand level-4 timer

expires. If the RDFNET process must wait for the the Expand level-4 timer to expire, it

will not be able to respond to the STOP RDF or abort RDF request until the timer

expires. By default, the timer is four or five minutes.

If you are waiting for the network master subsystem to shut down, and the operation

does not appear to be happening, check the communication lines to the other systems

in the network. If one of them is down and the RDFNET process is tying up the orderly

shutdown of RDF, stop the RDFNET process manually.

Note. If you must change the PNETTXVOLUME, the ImageTrail, or the RDFVOLUME of any

subsystem in your RDF network, then you must stop and reinitialize all of the RDF subsystems

in that network.

Caution. If you stop any RDF subsystem in an RDF network, you could lose large amounts of

committed data in the event of an unplanned outage.