MQSeries.net :: View topic - IMS BRIDGE Queues and MQMD-PRIORITY

PeterPotkay · Posted: Tue Feb 18, 2003 5:48 pm Post subject:

An IMS bridge queue is GET disabled from 2AM to 6AM, since the IMS Onlines are not up and running. For these four hours, the web application is accepting requests and sending the asynchronous messages to the Bridge queue. The Web application knows if it is between 2 AM and 6 AM, and will not wait for a reply but instead will put up a splash screen saying an email will be sent to them the next morning with their reply.

So at 6 AM, we have hundreds of request messages queued up on the bridge queue. As soon as the IMS onlines come back up, the queue is enabled and the messages flow into the OTMA. However, all these hundreds of messages take some time to process. If a user at the web front end sends in a request at 6:01 AM, they will wait for a reply, since the onlines are now up. But their request is now stuck behind all the previous night's messages.

How do I insure that the messages sent after 6 AM get prioritized to be processed before the previous night's messages? I would like to avoid creating a separate request queue to be used by the application between 2 and 6 AM. So I thought I might have the front end app set the priority of the messages sent outside of 2-6 AM to be higher than the ones sent between 2 and 6.

Would this work? What if the queue is enabled at 6 AM with 100 messages of PRIORITY zero. These messages will all "instantly" flow into the IMS queue, where they get queued up on the IMS queue, right? Does the MQMD-Priority get carried over and used somehow in the IMS queue as well? So that when a PRIORITY 9 message comes in, it goes straight into the IMS queue, and then to the head of the IMS queue? Or is it stuck at the back of the IMS queue, because MQMD-Priority is not translated into IMS?

Or will the messages stay queued up on the MQ bridge queue when the queue is enabled, going into OTMA one at a time, and as such the arriving messages will be put to the head of the MQ queue because of their priority?
_________________
Peter Potkay
Keep Calm and MQ On