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| keyswest |
 Posted: Tue Apr 19, 2011 3:28 pm Post subject: MQ V7 multi-instance queue manager HA vs Load balancing |
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Novice
Joined: 25 Apr 2008
Posts: 14
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Hi All,
We are trying to implement Multi instance queue manager in MQ V7. The documentation available so far indicates that it works only in active/passive (standby) mode and active/active mode can't be setup. Am i right?
So does it support only HA and not load balancing? Also can a cluster of queue managers be set up as multi instance or only stand alone queue managers?
We are trying to move from Windows to AIX with V7, it will be great if i can get some suggestions/best practices about this or tips on where to look for the right information.
Thanks,
Krish |
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| fjb_saper |
| Posted: Tue Apr 19, 2011 7:33 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Well, you can run an active / active setup but you need 2 qmgrs for that.
In the active / passive set up there is only one qmgr involved. One of its instances is active the other one is standby.
Can a clustered qmgr (MQ cluster) be setup as a multi-instance qmgr?
I haven't tried but I believe the answer is yes. However there is a caveat: ALL qmgrs in the cluster need to be at level 7.0.1.3 at minimum!
Have fun 
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| Vitor |
| Posted: Wed Apr 20, 2011 4:13 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| keyswest wrote: |
| So does it support only HA and not load balancing? |
Multi-instance is for HA, load balancing has been provided by clustering since v5.3
| keyswest wrote: |
| Also can a cluster of queue managers be set up as multi instance or only stand alone queue managers? |
Any queue manager (subject to being v7.x obviously) can be set up as MI; it's participation or not in a cluster is irrelevent to this.
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Insanity is the best defence. |
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| fjb_saper |
| Posted: Wed Apr 20, 2011 9:19 pm Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| Vitor wrote: |
| Any queue manager (subject to being v7.x obviously) can be set up as MI; it's participation or not in a cluster is irrelevant to this. |
Sorry to (respectfully) disagree.  
If you are setting up a V7 qmgr in a cluster as a MI qmgr, you better make sure that ALL qmgrs in the cluster are at a level that supports MI, otherwise the autodefined cluster sender may not make any sense to a qmgr at a lesser level...
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| mvic |
| Posted: Thu Apr 21, 2011 12:39 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| Vitor wrote: |
| Multi-instance is for HA, load balancing has been provided by clustering since v5.3 |
I thought it was 5.1.
But my memory may be incorrect. |
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| fatherjack |
| Posted: Thu Apr 21, 2011 12:55 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Knight
Joined: 14 Apr 2010
Posts: 522
Location: Craggy Island
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| fjb_saper wrote: |
| ...otherwise the autodefined cluster sender may not make any sense to a qmgr at a lesser level... |
If this is the case, then what you are saying is that all Qmgrs in a cluster need to be at the same level, irrespective of whether MI qmgrs are being used. Please clarify. 
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| exerk |
| Posted: Thu Apr 21, 2011 1:14 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| fatherjack wrote: |
| fjb_saper wrote: |
| ...otherwise the autodefined cluster sender may not make any sense to a qmgr at a lesser level... |
If this is the case, then what you are saying is that all Qmgrs in a cluster need to be at the same level, irrespective of whether MI qmgrs are being used. Please clarify. |
Perhaps it would be more accurate to state that all queue managers in a cluster must support the chaining of CONNAMEs, i.e. if an MI queue manager is part of a cluster, all the queue managers within the cluster must have the ability to natively address that queue manager.
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| mqjeff |
| Posted: Thu Apr 21, 2011 2:45 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| mvic wrote: |
| Vitor wrote: |
| Multi-instance is for HA, load balancing has been provided by clustering since v5.3 |
I thought it was 5.1.
But my memory may be incorrect. |
It didn't actually work very well until 5.3... |
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| Vitor |
| Posted: Thu Apr 21, 2011 4:20 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| mqjeff wrote: |
| mvic wrote: |
| Vitor wrote: |
| Multi-instance is for HA, load balancing has been provided by clustering since v5.3 |
I thought it was 5.1.
But my memory may be incorrect. |
It didn't actually work very well until 5.3... |
On sober and mature reflection, it might have been introduced earlier than v5.3.
But I agree with my most worthy associate that v5.3 was the first version worth attempting it on.
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| Vitor |
| Posted: Thu Apr 21, 2011 4:20 am Post subject: Re: MQ V7 multi-instance queue manager HA vs Load balancing |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| exerk wrote: |
| Perhaps it would be more accurate to state that all queue managers in a cluster must support the chaining of CONNAMEs, i.e. if an MI queue manager is part of a cluster, all the queue managers within the cluster must have the ability to natively address that queue manager. |
That's a much better way of putting it.
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| keyswest |
| Posted: Mon Apr 25, 2011 12:26 pm Post subject: |
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Novice
Joined: 25 Apr 2008
Posts: 14
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Thank you all for your inputs and suggestions. I will setting up the dev environment for MQ v7 using clustering for load balancing and HA through Multi Instance in the next couple of weeks.
I will share my findings with you guys...once again thanks for your inputs... |
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| kimmyj |
| Posted: Mon Jul 18, 2011 7:52 pm Post subject: |
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Joined: 26 Jun 2003
Posts: 19
Location: UK
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| ayeh |
| Posted: Tue Feb 07, 2012 4:55 pm Post subject: |
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Novice
Joined: 21 Oct 2001
Posts: 18
Location: Los Angeles, CA
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| fjb_saper wrote: |
Well, you can run an active / active setup but you need 2 qmgrs for that.
snip... |
Is running 2 qmgrs in an active/active MI configuration really possible? I'm still in the (rapid) research phase, so if there are great doc references, I would appreciate any and all comments.
Arthur
Old time MQ'er that hasn't touched V7 before. |
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| mqjeff |
| Posted: Wed Feb 08, 2012 2:27 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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don't misunderstand what MI provides.
MI is still an active-passive setup, not an active-active setup.
So when we do talk about an active-active MI configuration, we are discussing two separate active-passive queue managers. |
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| mvic |
| Posted: Wed Feb 08, 2012 2:49 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| mqjeff wrote: |
| So when we do talk about an active-active MI configuration, we are discussing two separate active-passive queue managers. |
Just as with HACMP et al? |
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