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On 10-Nov-2014 07:28 -0600, Mohan Eashver wrote:

I have an EDI system that keeps sending messages to a DataQueue.

What happens if our IBM i operator starts System IPL, when there is
unprocessed data sitting in our Data Queue ?

Do I lose the data or does it stay ?


As a general response, from the perspective of the OS, the messages on a Data Queue *persist* spanning IPLs.

Yet the actual effect depends, both on the perspective [the OS, the application, or even a third party] and the specifics of any particular scenario for how each party handles their part of the messaging, esp. with regard to handling-of\recovering-from interruptions.

However if the Data Queue (DTAQ) object is journaled, then the potential for loss of messages that were previously enqueued can be mitigated significantly. The journal provides protection for the data and the logged data is available for reference\use by the application.


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