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| fremar50 |
 Posted: Thu Jul 31, 2008 8:04 am Post subject: How can MQ client read messages from 2 queue managers |
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Newbie
Joined: 31 Jul 2008
Posts: 6
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We have MQ client on VMS/cache. We also have active/active configuration with 2 qmgrs on 2 different AIX boxes.
We need to know how to configure it so that client/cache applications can read/write from both qmgrs.
Help is greatly appreciated!!! Thanks in advance!! |
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| mlr |
| Posted: Thu Jul 31, 2008 12:56 pm Post subject: |
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Novice
Joined: 29 Jun 2008
Posts: 13
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connect to qmgr 1, read msgs
disconnect
repeat for qmgr 2
how hard was that to figure out? |
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| bruce2359 |
| Posted: Thu Jul 31, 2008 1:43 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| ...so that client/cache applications can read/write from both qmgrs. |
Do you mean you want the client application to be MQCONNected to two qmgrs concurrently (at the same time, together) to do MQPUTs and MQGETs? Or only one qmgr at a time?
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| fremar50 |
| Posted: Thu Jul 31, 2008 5:08 pm Post subject: How can MQ client read messages from 2 queue managers |
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Joined: 31 Jul 2008
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| It has to PUT/GET from both qmgrs at the same time. |
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| sridhsri |
| Posted: Thu Jul 31, 2008 6:02 pm Post subject: |
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Master
Joined: 19 Jun 2008
Posts: 297
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| If you want to PUT/GET to 2 QMgrs, then I'm afraid, you'll have to call MQCONN twice and pass different handles to each. |
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| AkankshA |
| Posted: Thu Jul 31, 2008 8:02 pm Post subject: Re: How can MQ client read messages from 2 queue managers |
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Grand Master
Joined: 12 Jan 2006
Posts: 1494
Location: Singapore
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| fremar50 wrote: |
| It has to PUT/GET from both qmgrs at the same time. |
run two instances of your application connecting to MQ... and specify the QM name accordingly... or if u have a simple program handling the connect for you then all you need to do is make each call twice with respective QM details..
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| fjb_saper |
| Posted: Thu Jul 31, 2008 8:09 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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This should only happen in a bridge design.
Otherwise get back to the drawing board. The app should have no need to connect to 2 qmgrs. Reroute everything to that the app only needs to connect to a single qmgr.
Enjoy 
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| David.Partridge |
| Posted: Thu Jul 31, 2008 11:26 pm Post subject: |
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Master
Joined: 28 Jun 2001
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If your intention is for one process to be connected to 2 different QMs and to pass messages between them, then the application will need at least two threads - one for each connection, and IIRC, you can only do this using MQClient. You'll then need to worry about communicating between the threads and synchronisation.
Alternatively, as AkankshA suggested, it may be so much easier to just run two instances of your application, one connected to each QM.
My real question though is what are you trying to achieve here, it seems that an MQ topology re-think would avoid the need to even think about this sort of problem.
If you can clarify the business problem, perhaps we can suggest a cleaner solution.
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David C. Partridge |
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| bruce2359 |
| Posted: Fri Aug 01, 2008 6:17 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| will need at least two threads - one for each connection |
If you intend to put/get in units of work (syncpoints), then a consideration is that MQCMIT/MQBACK use the connection handle, and you will have two of them. You would not be able to commit a put/get to both qmgrs in a single unit of work.
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| fremar50 |
| Posted: Fri Aug 01, 2008 7:05 am Post subject: How can MQ client read messages from 2 queue managers |
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Newbie
Joined: 31 Jul 2008
Posts: 6
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I hope this will clarify our purpose:
The 2 qmgrs in question are in an MQ cluster. We think there is no problem putting messages to the MQ cluster (we can use remote queue).
We need active/active configuration due to the business need of having an uninterrupted service at all times. We need to know how Client/Cache can pull messages from the MQ cluster in this case, how Cache client can pull messages from both members of the cluster?
Could you suggest any other MQ topology?
Question to fjb_saper: what is bridge design?
Thank you all so much for assistance! |
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| fjb_saper |
| Posted: Fri Aug 01, 2008 7:47 am Post subject: Re: How can MQ client read messages from 2 queue managers |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| fremar50 wrote: |
I hope this will clarify our purpose:
The 2 qmgrs in question are in an MQ cluster. We think there is no problem putting messages to the MQ cluster (we can use remote queue).
We need active/active configuration due to the business need of having an uninterrupted service at all times. We need to know how Client/Cache can pull messages from the MQ cluster in this case, how Cache client can pull messages from both members of the cluster?
Could you suggest any other MQ topology?
Question to fjb_saper: what is bridge design?
Thank you all so much for assistance! |
Bridge design: moving msgs between 2 different JMSProviders...
In your case run the application on both active qmgrs in your hardware cluster.
Enjoy
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| bruce2359 |
| Posted: Fri Aug 01, 2008 9:13 am Post subject: |
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Poobah
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Location: US: west coast, almost. Otherwise, enroute.
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In order for an application to MQGET a message from a queue, the application must be MQCONNected to the qmgr where the local queue with the message exists. There is no remote get.
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I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| leoChina |
| Posted: Thu Sep 04, 2008 10:15 pm Post subject: |
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Joined: 04 Sep 2008
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| you can use a MQ cluster to actualize the active/active?if it was, you could get the information from IBM website |
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