RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Network Transactions
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
13-4
RDF Network Synchronizer Process
PNETTXVOLUME Network Attribute
This is the name of the volume on the specified primary system where the RDF
subsystem stores an audited network synchronization file. It must be a data volume
protected by the RDF subsystem on the specified primary system and be configured to
the MAT. It is set by the following RDFCOM command.
SET NETWORK PNETTXVOLUME volume-name
There is no default value.
Adding the Network Record
When you have finished setting the attributes for a given RDF subsystem, you add that
information to your current configuration file with the following RDFCOM command.
ADD NETWORK
RDF Network Synchronizer Process
RDF/IMPX includes a new RDF executable process, the RDFNET process, that can
only be configured within a network master RDF subsystem (and can therefore only be
started on the network master’s primary system).
This process provides a synchronization point within the image trails of all backup
systems in an RDF network. The process does that by updating an audited file named
ZRDFNETX on the primary system of each RDF subsystem in the RDF network. The
overhead of this process should be transparent because the RDFNET process only starts
a single transaction every 15 seconds and only executes a single update against the
ZRDFNETX file on the primary system of each RDF subsystem in the RDF network.
The fully-qualified name of the ZRDFNETX file for each system is:
$<volume-name>.<subvolume-name>.ZRDFNETX
where <volume-name> is the configured PNETTXVOLUME network attribute and
<subvolume-name> is the configured REMOTECONTROLSUBVOLUME network
attribute.
New RDF Control Files
The following control files have been added to the Master Image Trail (MIT) subvolume
of all RDF subsystems that support replication of network transactions: ZRDFLCMT,
ZRDFLCM2, and ZNETUNDO. Additionally, the network master has three more files:
ZRDFNMTX, ZRDFNMT2, ZRDFNMT3. These files contain internal information that
RDF needs to correctly execute takeover operations involving an RDF network. The
files are empty until you actually initiate a takeover operation on a backup system within
an RDF network.