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

Installing and Configuring RDF

HP NonStop RDF/IMP and IMPX System Management Manual—524388-001

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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.