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| compression question |
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| TonyStewartFan |
 Posted: Thu Oct 12, 2006 6:30 am Post subject: compression question |
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Newbie
Joined: 02 Oct 2006
Posts: 1
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Hi all,
This is my first time working with channel message compression (COMPMSG). I wanted to make sure I understood what is going on.
We have a client on machine A, and qmgrs on machines B, C and D. A, B, and C are all at 6.0.1 and the channels between them have COMPMSG set. D is at 5.3.1, so no compression on its channels.
A message is put on the client A, which is sent to D by means of remote queues on B and C (A->B->C->D).
So message compression occurs between A and B, and B and C. But not between C and D, of course.
Is the message compression/uncompression in this example done twice, once for each channel with compression? Or is it done once and not uncompressed in the middle?
And then when it's sent over the C to D channel, there's no evidence of it ever having been compressed, correct? I assume the only way to have any compression on this channel would be through channel exits (unless we upgrade.)
Thanks for any help or suggestions. |
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| jefflowrey |
| Posted: Thu Oct 12, 2006 6:58 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Compression processing will occur inside the message channel agent, AFAIK.
That means that if a message goes from A to B to C to D, then it will be compressed in the mca on A, decompressed in th mca on B, compressed in the mca on B, decompressed in the mca on C, and then sent normally from the mca on C and received normally in the MCA on D.
There's more than one reason to avoid multi-hopping if at all possible.
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I am *not* the model of the modern major general. |
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