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MQSeries.net Forum Index » General IBM MQ Support » How are handled large messages

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KAKEZ
PostPosted: Mon Jan 13, 2003 10:46 pm    Post subject: How are handled large messages Reply with quote

Centurion

Joined: 10 Oct 2002
Posts: 117
Hi,
i need some clear explanations about this topic:
for instance having a 100 Mb message:
- do we need to define a 100 Mb buffer within the appli to store it before MQPUT?
- how does the sending MCA do with this message to send it? do we need to define the Channel max message length to 100 mB also? the message is fragmented by the MCA when sending it?
or
- in the case of large messages do we need to fragment it before sending it on a channel? or the MCA is able to send such a message without fragmentation by the appli?
thanks for help
Jack
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mgrabinski
PostPosted: Mon Jan 13, 2003 10:54 pm    Post subject: Reply with quote

Master

Joined: 16 Oct 2001
Posts: 246
Location: Katowice, Poland
Hi,

1) Yes, you need to alocate a buffer for your message (unles you are using referential messages for sending files)

2) Yes. The actual maximum used is the lower of the values defined for each end of the channel.

3) If you use the MQPM)_SEGMENTATION_ALLOWED option, the mesasge will be automaticaly fragmented. The getting appl can specify MQGMO_COMPLETE_MSG to get the whole message, not just a segment of it
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Marcin Grabinski <><
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