RDF/IMP, IMPX, and ZLT System Management Manual

Installing and Configuring RDF
HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002
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Configuring RDF
RDF image trail file (with a primary extent size of 3000 pages and a secondary extent
size of 3000 pages) reside on the volume $IMAGE, issue the following commands:
]SET RECEIVER PROCESS $RECV
]SET RECEIVER CPUS 0:2
]SET RECEIVER PRIORITY 185
]SET RECEIVER RDFVOLUME $IMAGE
]SET RECEIVER EXTENTS (3000,3000)
]SET RECEIVER ATINDEX 0
]ADD RECEIVER
You cannot start RDF until you have configured a master receiver process.
You can issue ADD RECEIVER commands only when RDF is stopped.
Image Trails
As noted earlier, the RECEIVER RDFVOLUME option value specifies the disk volume
that contains the receiver’s master image trail. The receiver process writes all
commit/abort records to this volume. All updaters must be configured to secondary
image trails.
To create secondary image trails, use the ADD IMAGETRAIL command. Later, when
you configure your individual updater processes, you assign each of these processes
to a specific image trail. By spreading updaters across secondary image trails, you
reduce the number of updaters contending for a specific trail. ATINDEX specifies which
receiver will write to that trail; 0 is the default.
Each secondary image trail contains the audit records needed by the associated
updater processes. Image trail files in secondary image trails have the same extent
sizes as image trail files on the volume specified by RDFVOLUME.
To add one secondary image trail to the volume named $IMAGA1 and another to the
volume named $IMAGA2, issue the following commands:
]ADD IMAGETRAIL $IMAGA1
]ADD IMAGETRAIL $IMAGA2
Note. To have secondary image trails, you must add them after initialization and before RDF
has been started for the first time. Also you cannot add secondary image trails until you have
configured the receiver, as described in the previous paragraphs. The secondary image trail
files have the same extents as the master image trail files. To delete a secondary image trail,
you must stop RDF, delete any updaters associated with the particular trail, and then delete
the trail. Normally, you should never delete a secondary image trail until RDF has completely
caught up with TMF.