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| Large Messages in the Broker |
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| juerg padrutt |
 Posted: Tue Feb 28, 2006 7:33 am Post subject: Large Messages in the Broker |
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Newbie
Joined: 28 Feb 2006
Posts: 1
Location: Switzerland
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Is anybody aware of a document from IBM stating limits, possibly for different platforms (zOS, Solaris, Windows, AIX) what happens if one sends large messages (above 10 GB) through a broker flow?
Thanks a lot for any hint.
Juerg Padrutt |
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| smdavies99 |
| Posted: Tue Feb 28, 2006 8:30 am Post subject: For message from WMQ... |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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The limit is 100Mb
This is documented in the WMQ documentation.
For other transports it could be different (eg HTTP)
But my question is why? oh Why would anyone want to send something as large as 10GB?
- How many systems have enough RAM to cope with this
- How long will this take to send over a comms link
- etc etc etc
Stephen D
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| Paul D |
| Posted: Tue Feb 28, 2006 9:08 am Post subject: |
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Master
Joined: 16 May 2001
Posts: 200
Location: Green Bay Packer Country
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Expect to have to tune MQ at some point for this, not just broker. That is critical. We did large messages in MB v5 and needed to tune MQ at around 10 MB. This was under AIX 5.1 (pretty old AIX version). Read MQ tuning for large messages first. Tuning of the JVM heap was another consideration if you are using the JVM. General DFE memory size is not too bad, just monitor it as you always should.
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Thanks!!!
Paul D |
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| SixBlade |
| Posted: Wed Mar 01, 2006 6:21 am Post subject: |
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Apprentice
Joined: 03 Dec 2003
Posts: 26
Location: UK
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| For such a large message as 10GB, I would probably rather use FTP than MQ as transport (or good compression before putting on the wire), and if use broker, be really careful to not parse entire message (example for xml: http://www-128.ibm.com/developerworks/websphere/library/techarticles/0505_storey/0505_storey.html). It will probably be tricky to keep RAM usage down, and broker (execution group) will hang on to used RAM for performance reason, which can mean other flows won't be able to get needed memory. Basically, it's not just about limits. |
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