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

Installing and Configuring RDF
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
3-16
Initializing and Configuring 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.
To a TMF Shutdown Timestamp
If TMF was running previously on the primary system and did not need to be initialized
and configured, you can initialize RDF to a timestamp that reflects the time of the last
TMF shutdown.
To issue the INITIALIZE RDF command without first initiating an RDFCOM session,
enter the command in the following format in response to the TACL prompt. In the
TIMESTAMP parameter, be certain to specify the exact time (to the minute) that TMF