RDF/IMP, IMPX, and ZLT System Management Manual

Installing and Configuring RDF
HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002
3-14
TMF Subsystem Running Previously
TMF Subsystem Running Previously
If TMF was running on the primary system and you have shut the TMF subsystem
down, and if you have started TMF on the backup system and added the RDF updater
volumes to the TMF configuration, you need not take any other steps with respect to
TMF. Proceed to the next task, described in Initializing RDF.
Initializing and Configuring RDF
After initializing and configuring TMF, you are ready to initialize and configure RDF.
Initializing RDF
To initialize RDF, you issue an INITIALIZE RDF command at the primary system.
When executed, this command:
•
Establishes new configuration and context files for the new RDF configuration (that
resides in the control subvolume)
•
Identifies the backup system in the configuration
•
Indicates where in the MAT RDF should begin operations
The INITIALIZE RDF command also establishes the name of the RDF control
subvolume, which you must subsequently specify when initiating RDFCOM sessions. If
you enter this command for an RDF configuration that already exists, you must
explicitly purge the configuration files from the control subvolumes on both the primary
and backup systems; otherwise, an error message will appear. This requirement helps
ensure that you do not accidentally destroy the wrong RDF configuration in cases
where multiple RDF configurations exist for replication to multiple backup systems.
If you are going to replicate database changes to multiple backup systems, you must
also specify a one-character control subvolume suffix in the INITIALIZE RDF command
for individual configurations. If you specify a suffix character, the control subvolume
name is the name of the primary system without the backslash and with the suffix
character appended to it. If you omit the suffix character, the control subvolume name
is the name of the primary system without the backslash and without a suffix character.
As a general rule, you can only issue the INITIALIZE RDF command if all of the
following conditions exist:
•
TMF is initialized.
•
RDF is not running.
•
You are logged on under TACL as a member of the super-user group.
•
You have remote passwords on both the primary and backup systems.
For complete information about the INITIALIZE RDF command, see the description of
the INITIALIZE RDF command in section 8.