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

Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
5-1
5
Managing RDF
In managing RDF, you must sometimes react to nonroutine events and conditions that
affect the RDF operating environment, by performing a variety of special tasks and
activities. Although most of this work is not required on a regular basis, the need for it
does arise on occasion. Typically, this work involves using RDFCOM, TMFCOM (the
interactive interface to TMF), or TACL (the interactive interface to the Compaq
NonStop™ Kernel operating system).
This section, which is directed to both system managers and operators, discusses the
following tasks:
•
Recovering from file system errors
•
Handling disk space problems
•
Responding to operational failures
•
Stopping RDF
•
Carrying out a planned switchover
•
Initiating takeover operations
•
Reading the backup database
•
Replicating SQL DDL operations
•
Backing up image trails
•
Making online dumps with updaters running
•
Doing FUP RELOAD operations with updaters running
•
Compressing exception files
Recovering From File System Errors
Errors detected by the operating system’s file system generate error numbers that appear
within RDF messages reported in the EMS event log. Of particular importance are the
file system errors that can cause RDF error messages 700 (modify operation), 705 (open
operation), or 739 (create operation). As an example, file system error 59 appears in the
following RDF error message 705:
705 File Open Error 59 \FRESNO.$TAXREP.Y92.M05
Tables 5-1, 5-2, and 5-3 list the file system error numbers and appropriate recovery
actions. In general, when any of these errors occurs, one of the following actions results:
•
The error is reported in the EMS event log, with the error causing the process that
received it to restart from a previously set restart point.
•
The error is reported in the EMS event log, and the requested operation is skipped.
For information about restart points, see Updater Processes
in section 1.