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| Dealing AA with MQ clients java applications |
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| orman |
 Posted: Sat Jan 24, 2015 6:11 am Post subject: Dealing AA with MQ clients java applications |
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Apprentice
Joined: 08 Aug 2013
Posts: 40
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Hello everyone,
I am a broker developer (for 5 years), and recently we want to migrate our environment to be AA.
We have some MQ clients java applications that works with out QMs.
Our environment is like:
QM1 multi-instance (2 hosts)
QM2 multi-instance (2 hosts)
What means -
1. Load balancing between 2 QM (QM1/QM2)
2. Dealing with scenario of failure - HA (standby goes to active)
So, I thought about ways to figure out this case
1 - MQ cluster between the 2 QMs
2 - make my MQ client applications use CCDT file (*.TAB) to reconnect when MQ connection fail
I was looking on the web and use this one -
http://www-01.ibm.com/support/docview.wss?uid=swg27020848
What about using 2 QM's of the broker to be clustered together
* Scenario 5 - Queue Manager Group: ' ' (1 blank character) - helps for AA (2 different instances running parallel)
* Scenario 7 - Multi-Instance Queue Manager (hot backup for any instance)
MQ client application will connect to an active QM and the message will LB between the active instance.
I tested it and it works well but, I don't really like the CCDT configuration.
It is not that readable and the file is binary (i know i can use MQSC command).
I would like to have a connection configuration in clear-text file that is editable and readable.
What do you think about that ?
*Another solution is to use DNS LB which LB when using put (after disconnect) and deal in case of failure
**Another problem that I didn't figure yet is MQGet -
when application is listening to queue - should it listen to all my AA QMs or just to one of it - means the QMs wont act as AA when send messages to clients.
So, what is your opinion ? |
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| orman |
| Posted: Sat Jan 24, 2015 6:18 am Post subject: in addition |
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Apprentice
Joined: 08 Aug 2013
Posts: 40
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Additional question,
DataPower as another MQ client does not using the CCDT file. So, how can I use it to works well?
I read some correspondences about it and as I understand for now there is no support with CCDT so the best solution is
1. For sending (MQPut) - using MQ cluster load balancing
2. For receiving (MQGet) - each DP as to listen to all the active QMs
What do you say about it ? |
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| PeterPotkay |
| Posted: Sat Jan 24, 2015 10:11 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7717
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For #1, use a Queue Manager Group in DataPower so you have a primary /secondary queue manager "table".
If you want to load balance messages being put from DataPower across 2 queue managers, you will need to create two services that put, each using a different QM Group, one that has QMA and primary and QMB for secondary, while the other has QMB as primary and QMA as secondary.
For #2, you are correct.
_________________
Peter Potkay
Keep Calm and MQ On |
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