If a Dynamic Extend fails for my CA Datacom/AD database, will my CA application stop running?

Document ID : KB000033314
Last Modified Date : 14/02/2018
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Question: 

If a Dynamic Extend fails for my CA Datacom/AD database, will my CA application stop running?

With normal processing of CA Datacom/AD, if an application data or index area reaches 100% full, that area will be dynamically extended. However, if the file has 16 extents, or there is not enough room on the current volume to add another extent, this process will fail. What happens next depends on a few factors.

Answer: 

If the data or index area cannot be extended, read activity or update-in-place activity will continue normally, but any inserts for new records, or updated records that need to be moved to a new location will fail. For many of the CA applications using CA Datacom/AD as their data store, this could cause an interruption in business processing.

If the file is not yet at 16 extents and there is some space on the volume – even if the desired amount is not available – it is possible to perform a directed Dynamic Extend for that amount and allow processing to continue for a time.

Please refer to TEC580465, titled “How to extend an area in CA Datacom while the application is running and the database is open” for more information about this directed dynamic extend process.

Additional Information:

For more information about the Extend process, please refer to the CA Datacom/DB Database and System Administration Guide, in the sections “Creating and Maintaining Index Areas (IXX)Extending the Index Area (IXX)” and “Creating and Maintaining Data AreasAllocating Data Areas › Extending Data Areas”.

As always, please contact CA Technologies support for CA Datacom if you have further questions.