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

Auxiliary Audit Trails
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
12-2
Error conditions
A master extractor and receiver are required, because TMF control records are required
on the backup system in the event of an RDF takeover operation or a stop-update-to-
timestamp operation. Auxiliary extractors and receivers are optional.
For each extractor, there must be a corresponding receiver with the same atindex
value.
Error conditions
•
It is an error not to have a master extractor (atindex value of 0).
•
It is an error not to have a master receiver (atindex value of 0).
•
It is an error if you do not have an auxiliary extractor and receiver with the same
atindex value. That is, if you have an auxiliary extractor with an atindex
value of 1, you must have an auxiliary receiver with an atindex value of 1.
•
It is an error if the specified atindex does not correspond to a valid index of a
configured auxiliary audit trail. That is, if you have configured two TMF auxiliary
audit trails with the respective audit trail numbers of 1 and 2, you cannot configure
an auxiliary extractor with an atindex value of 3.
•
It is an error to specify two extractors or two receivers with the same atindex
value.
Configuring Image Trails
Each image trail must be exclusively managed by a single receiver process, and all audit
records stored in an image trail must come from the same primary system audit trail.
Therefore, if your RDF environment is to protect primary system data volumes that are
configured to auxiliary audit trails, you must use the following command to associate
each image trail with the appropriate receiver:
SET IMAGETRAIL ATINDEX atindex
where atindex is an integer value from 0 through 15 specifying which receiver
manages the image trail. 0 specifies the receiver associated with the MAT; 1 through 15
specifies the receivers associated with auxiliary audit trails AUX01 through AUX15,
respectively.
The default value is 0.
After the SET IMAGETRAIL ATINDEX command, you must issue an ADD
IMAGETRAIL command.