| |
|
RSS Feed - WebSphere MQ Support
|
RSS Feed - Message Broker Support
|
  |
|
| WMQI Operation in an MQSeries Cluster Environment |
« View previous topic :: View next topic » |
| Author |
Message
|
| megani |
 Posted: Wed Jul 16, 2003 3:58 pm Post subject: WMQI Operation in an MQSeries Cluster Environment |
 |
|
Apprentice
Joined: 19 Dec 2001
Posts: 27
|
Hello, we will have several (for now 2) hub (WMQI servers) receiving messages from Siebel application servers. This is an MQSeries cluster environment. As I understand the beauty of clustering is that messages will be sent to the WMQI servers ina round-robin fashion. My question is if one of the WMQI servers go down and then all subsequent messaging has to go to the one WMQI server how long does this take. Basically, how long does it take MQSeries to figure this out and route to the alive WMQI server. Instantaneously? During this process isn't possible that some messages will have gone to the down WMQI server and be residing on its queues just staying there until the server is brought to life.
I know this is asking alot but I'm just looking for some input.
Thanks very much. |
|
| Back to top |
|
 |
| Michael Dag |
| Posted: Wed Jul 16, 2003 10:28 pm Post subject: |
|
|
Jedi Knight
Joined: 13 Jun 2002
Posts: 2607
Location: The Netherlands (Amsterdam)
|
You got a good grasp of MQ clustering. I have used a similar setup, it allows you to load balance, work over 2 Qmgrs and 2 brokers and if they are on seperate machines it also allows you to do maintenance while a part of the system is still running.
Clustering is not meant for failover, if you want your Qmgr or Broker to failover use HACMP for AIX or Veritas / Sun Cluster for Solaris.
When you only have 2 boxes and want to fully use them all the time use a QMgr on each box, let the other box mirror that Qmgr and build a cluster of the two qmgrs.
As soon as MQ detects one of the Qmgrs is down the messages go to the other using clustering, if this down siutation is not 'normal' the failover will kick in and start on the other box (your performance on one box will go down, but you won't have stuck messages)
Ideally this would be done using 4 boxes, but everything has it's price...  |
|
| Back to top |
|
|
| zpat |
| Posted: Thu Jul 17, 2003 2:48 am Post subject: |
|
|
Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
|
There are several issues here, one is that the MQ Queue Manager on the WMQI broker may be working fine and receiving messages, but the broker itself could be out of service and not processing them.
Even if the MQ Queue Manager does fail and the clustering re-directs messages to the other one, there may well be unprocessed messages residing on the queues that are then not accessible. |
|
| Back to top |
|
|
|
|
|
| |
|
Page 1 of 1 |
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
|
|
