using DTAQ in COBOL -- COBOL400-L

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We are wanting to use a data queue for a web application that will be
running as close to 24/7 as we can get. 

We want the web program to send the data to a data queue and a COBOL program
to process the record and then wait for the next one. What makes the COBOL
program set on the READ statement and how do you handle opening and closing
of files?

We want to halt the COBOL program and let the queue just build up while we
run a backup on the files. Do you abort the job and let it close the files?
Appreciate any advice.  
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