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| PeterPotkay |
 Posted: Mon Nov 29, 2004 8:32 pm Post subject: Maximum Message Set size |
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Poobah
Joined: 15 May 2001
Posts: 7722
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MQ 5.3.0.8
WB-IMB 5.0.4
Win2000 SP4
How big can a Message Set be? Yes, I know the max message size can be 100 meg, but what is the limit on the message *set* size? I looked and looked, but didn't find anything. Is there no hard limit?
(Let's ignore the logic of having a message so big that it would need a gigantic message set, just for the sake of arguement.)
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Peter Potkay
Keep Calm and MQ On |
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| PeterPotkay |
| Posted: Mon Nov 29, 2004 8:41 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Message BIP1835
Scenario: You see the error message BIP1835.
Explanation: The message set that you are deploying produces a message set dictionary larger than the internal limit of 4MB. This could be because you have many large message definitions defined to the same message set.
Note: The size of an exported message set is not a good indication of the size of the message set dictionary that is generated at deploy time, because the exported message set is stored as XML. This can be very verbose, but the dictionary has a much more compact internal format.
Solution: Split the message definitions into several smaller message sets.
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I found this in the Online Help. I am (incorrectly?) assuming that a message set can not be bigger than 4 meg, because this dictionary thingy can't be bigger than 4 meg, and it is bigger than the message set?
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Peter Potkay
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| kirani |
| Posted: Mon Nov 29, 2004 11:20 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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I don't know what is the percentage size of Message Set Dictionary to it's actual size. But if you have config mgr and Broker on two different queue manager then you need to make sure your message length on xmit queue and channels is greater than 4 MB for deploying large message flows/sets.
I guess the message set size limitation would be set by resource limitation on your hardware.
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Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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| PeterPotkay |
| Posted: Tue Nov 30, 2004 5:10 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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I am aware of all the fun stuff needed with moving MQ messages up to 100MEG between QMs, Brokers and ConfigMgrs. But I am being asked, "How big can a Message Set be?" I was thinking what you are saying, there is no defined limit, until I found the nore regarding BIP1835.
If the dictionary will always be as big or bigger than the set, and the dictionary cant be bigger than 4 MEG, stands to reason that a set can't be bigger than 4 meg, no?
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Peter Potkay
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| KeeferG |
| Posted: Tue Nov 30, 2004 5:21 am Post subject: |
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Master
Joined: 15 Oct 2004
Posts: 215
Location: Basingstoke, UK
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I believe there is no upper limit for these things from a WBI MB point of view. Obviously the limit of 100MB of MQ will be a stumbling block although the largest set I ever deployed was approx 35MB although this was on WMQI
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Keith Guttridge
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Using MQ since 1995 |
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| Heinz57 |
| Posted: Tue Nov 30, 2004 6:58 am Post subject: |
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Apprentice
Joined: 21 Jan 2004
Posts: 26
Location: Syracuse, NY
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| We have increased the channels/queues to 100mb to allow for the huge msgsets. Our largest so far is in the 20+mb range. By increasing the max msglength on the channels/queues (system, broker, config, etc), we can deploy to our multi broker environment without a problem. When we get to a msgset over 100mb, we're probably in trouble..... |
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| PeterPotkay |
| Posted: Tue Nov 30, 2004 7:02 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Heinz57, was that 35Mb message set at 2.1 or 5.0? That dictionary comment seems to indicate 4 meg would be the max at 5.0.
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Peter Potkay
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| Rockon |
| Posted: Thu Dec 02, 2004 1:36 pm Post subject: |
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Apprentice
Joined: 24 May 2004
Posts: 43
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Another Quick Question
Is there a limit on the number of message flow per message flow project?
...and what is the difference between Child and sibling? |
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| jefflowrey |
| Posted: Thu Dec 02, 2004 1:43 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| Rockon wrote: |
| and what is the difference between Child and sibling? |
It's exactly what it says. One is a child, and one is a sibling.
A sibling is a brother/sister -a node at the same hierarchical level with the same parent node.
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