Re: IMS BRIDGE Queues and MQMD-PRIORITY
Peter, Elegant solutions are possible on the IMS side too. An existing IMS queue can be reordered readily, though exit code written in assembler, C, or PL/I is sometimes required. A licensed IBM program product called IMS Queue Control Facility for z/Os V1R2 would have to be available, and I don't know whether ETSD at the Hartford has it installed. This product also makes ISPF-based browsing facilities for IMS queues available, and they would be helpful in sorting out what is happening on the IMS side of your application. To read about QCF you can download a copy of the IBM publication IMS Queue Control Facility for z/OS User's Guide, SC26-9685-02 from the IBM publications website. John Gilmore SystemCraft LLC - Original Message - From: Doug Jenkins Sent: 05 February, 2003 14:15 To: [EMAIL PROTECTED] Subject: Re: IMS BRIDGE Queues and MQMD-PRIORITY Would adding more MPR's at 6am allow faster handing of the requests?Doug "Potkay, Peter M (PLC, IT)" To: [EMAIL PROTECTED] TFORD.COM> Subject: IMS BRIDGE Queues and MQMD-PRIORITY 02/05/2003 09:11 AM Please respond to MQSeries ListAn IMS bridge queue is GET disabled from 2AM to 6AM, since the IMS Onlinesare not up and running. For these four hours, the web application isaccepting requests and sending the asynchronous messages to the Bridgequeue. The Web application knows if it is between 2 AM and 6 AM, and willnot wait for a reply but instead will put up a splash screen saying anemailwill be sent to them the next morning with their reply.So at 6 AM, we have hundreds of request messages queued up on the bridgequeue. As soon as the IMS onlines come back up, the queue is enabled andthemessages flow into the OTMA. However, all these hundreds of messages takesome time to process. If a user at the web front end sends in a request at6:01 AM, they will wait for a reply, since the onlines are now up. Buttheirrequest is now stuck behind all the previous night's messages.How do I insure that the messages sent after 6 AM get prioritized to beprocessed before the previous night's messages? I would like to avoidcreating a separate request queue to be used by the application between 2and 6 AM. So I thought I might have the front end app set the priority ofthe messages sent outside of 2-6 AM to be higher than the ones sent between2 and 6.Would this work? What if the queue is enabled at 6 AM with 100 messages ofPRIORITY zero. These messages will all "instantly" flow into the IMS queue,where they get queued up on the IMS queue, right? Does the MQMD-Prioritygetcarried over and used somehow in the IMS queue as well? So that when aPRIORITY 9 message comes in, it goes straight into the IMS queue, and thento 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 queueisenabled, going into OTMA one at a time, and as such the arriving messageswill be put to the head of the MQ queue because of their priority?Peter PotkayIBM MQSeries Certified Specialist, Developer[EMAIL PROTECTED]X 77906This communication, including attachments, is for the exclusive use ofaddressee and may contain proprietary, confidential or privilegedinformation. If you are not the intended recipient, any use, copying,disclosure, dissemination or distribution is strictly prohibited. Ifyou are not the intended recipient, please notify the senderimmediately by return email and delete this communication and destroy allcopies.Instructions for managing your mailing list subscription are provided inthe Listserv General Users Guide available at http://www.lsoft.comArchive: http://vm.akh-wien.ac.at/MQSeries.archiveInstructions for managing your mailing list subscription are provided inthe Listserv General Users Guide available at http://www.lsoft.comArchive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: IMS BRIDGE Queues and MQMD-PRIORITY
Would adding more MPR's at 6am allow faster handing of the requests? Doug "Potkay, Peter M (PLC, IT)" To: [EMAIL PROTECTED] Subject: IMS BRIDGE Queues and MQMD-PRIORITY 02/05/2003 09:11 AM Please respond to MQSeries List 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 IBM MQSeries Certified Specialist, Developer [EMAIL PROTECTED] X 77906 This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email and delete this communication and destroy all copies. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: IMS BRIDGE Queues and MQMD-PRIORITY
Peter, The MQMD-Priority is used by MQ to decide the order in which to send messages to IMS; they are all queued at the same priority within IMS. I'm not aware of any priority system on the IMS message queue; even if it exists, the MQ-IMS Bridge does not take advantage of it. I suspect your best approach to this would be to extend the "you will get your response later" period to allow the backlog to be processed before expecting the normal response period! Whether this is acceptable or not probably depends on how long the backlog takes to process. Regards John J Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
