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

Preparing the RDF Environment

Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001

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Mixed-Release Installation

RDF/IMP and IMPX are not compatible with RDF, RDF/MP, and RDF/MPX.

Therefore, if you already have any of those earlier RDF products installed, you cannot

install RDF/IMP or IMPX on just one of your systems; you must install it on both the

primary and backup systems.

The primary and backup systems need not have the same operating system version

installed. The only requirement is that the installed version on either system be at least

D46 or G06.03.

Configuring TMF for RDF Operations

TMF attempts to purge old audit trails each time it rolls over to a new one. The purge

operation is successful only if the audit trail is not pinned on behalf of RDF.

If audit dumping is disabled and TMF were to purge an audit trail before it has been

pinned, you must reinitialize RDF and resynchronize the databases.

You can, however, configure TMF with a dump process to dump audit trail files to tape

or disk. If TMF dumps audit trail files, the extractor waits until that audit trail is restored

from tape and then resumes. In that case, you do not need to reinitialize RDF or

resynchronize the databases.

TMF Configuration With Dump Process

When you configure TMF with audit dump on, that subsystem dumps an audit trail to

tape or disk before purging the audit trail. This approach is strongly recommended on

the primary system.

Note that in the D30 and later TMF environments audit trail files are pinned by the TMP

and will not be purged until RDF has finished processing them (any outstanding file

pinning is, however, lost if you shut down TMF).

You can control when TMF dumps an audit trail by configuring TMF for dump to tape.

For example, when configured with a tape dump process, TMF issues a prompt for the

operator to mount a tape when TMF is ready to dump and purge an old audit trail file.

Because TMF cannot execute the dump and purge of the audit trail file until a tape is

mounted, the operator can wait until the RDF extractor finishes that file before mounting

the tape.

For more information on configuring a D30 or later release of TMF, see the NonStop™

TM/MP Planning and Configuration Guide.

TMF Configuration Without Dump Process

Long ago, the RDF product required that you configure TMF with a dump process that

dumps to tape. RDF no longer imposes this requirement on either the primary or backup

systems, however, for the following reasons:

1. On the primary system, the RDF extractor explicitly pins the audit trail it is currently

processing, thereby preventing TMF from purging it. This explicit pinning remains

in effect even if the extractor process fails or RDF is shut down.