CA IDMS/DC Messages DC172010 - DC220000 › DC200023

DC200023

CV Change Tracking is <CV-Change-Tracking-status>

Reason:

This is an informational message that shows the current status of the CV Change Tracking feature.

Module:

RHDCDBRC

Severity:

8

DC200024

CA IDMS Change Tracking is in use.

Reason:

Change tracking enables changing the database environment of a CV in a fault-tolerant manner. Specifically, it permits the DBA to perform the following dynamic actions:

• Vary the data set name of a journal or database file within a CV without introducing the need for manual intervention in the case of a CV failure.
• Vary a new version of a DMCL without introducing the potential for a warmstart failure.
• Vary the status of an area or segment permanently on a CV without regard to subsequent page range changes.
• Change the journal files in use by a CV and coordinate those changes with the associated archive journal jobs.

If the CV fails, the runtime database definition is restored from SYSTRK files during restart, ensuring that the files being updated at the time of failure are the ones recovered by warmstart unless explicitly overridden by changes in the JCL used to restart the CV.

This message is produced by the IBM Health Checker facility. For more information about health checks related to CA IDMS, see the CA IDMS System Operations Guide.

Module:

RHDCHCHK

Severity:

0

DC200025

Change Tracking of the CA IDMS system <node-name> is disabled because no SYSTRK file is allocated or referenced in the CV startup JCL.

Reason:

A SYSTRK file contains a description of the database environment most recently in use by the CV. During startup an image of the current DMCL is written to SYSTRK along with information about database and journal files defined in the JCL.

If no SYSTRK file is referenced in the execution JCL of the CV, change tracking is not in effect, meaning that the potential for a warmstart failure is introduced when varying in a new copy of a DMCL or dynamically changing the data set name of a file. Additionally, any permanent status established for an area whose page range is changed is lost or may be misapplied to another area whose page range is also changed.

This message is produced by the IBM Health Checker facility. For more information about health checks related to CA IDMS, see the CA IDMS System Operations Guide.

Module:

RHDCHCHK

Severity:

0