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| Passing data among different platforms |
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| jeevan |
 Posted: Wed Aug 30, 2006 11:05 am Post subject: Passing data among different platforms |
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Grand Master
Joined: 12 Nov 2005
Posts: 1432
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I would appreciate any help to clarify the following scenario.
My client has a complex data conversion need. The scenario is something like this. Betwen the two end platforms, the data has to pass throuh varios other ( at least one more - platform). They have Windows, Sun Solaris, z/OS and AIX mq nodes.
Quesiton 1: What happen when data get passed through different platform having different data encoding system in between? Does it get corriupted ? does it require to convert data when it passes throuh different encoding or we can just convert for the final destination platform?
Qeustion 2: by some reasons, if channel receive a data in ASCII and it has convert yes and the final destiniation is also ASCII, what would happen? Does the data get corrupted? |
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| wschutz |
| Posted: Wed Aug 30, 2006 11:08 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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The design point of MQ data conversion is that the data is only converted when it is received (ie MQGET), so the data passing through different systems should have no effect... and, if the data is already in the required ccsid/encoding, then no conversion is done.
This is why converintg on the channel is NOT recommended.
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-wayne |
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| jeevan |
| Posted: Wed Aug 30, 2006 11:27 am Post subject: |
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Grand Master
Joined: 12 Nov 2005
Posts: 1432
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Wayne,
Thank you very much for you quick reply. Let me be more clear here.
To be more specific, what the are asking is to put convert (yes) in all sender channel so when data passes throug next platfomr get converted. What I am wondering ( I do not have experiences doing this) is that what happens if the sending and receiving platform are the same. The appl guys say the data does get converted in this case, and if the platform are different, data get convderted and we will not have problem. But I am not sure.
I agree with you, but I need to convince them what they are asking has problem. |
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| jefflowrey |
| Posted: Wed Aug 30, 2006 11:50 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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You should tell them that it is explicitly recommended NOT to set channel conversion on sender channels in cases where messages are known to have multiple hops.
This will cause them problems, eventually if not immediately.
Then tell them that if they insist on doing this, you are not responsible for the results.
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I am *not* the model of the modern major general. |
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| fjb_saper |
| Posted: Wed Aug 30, 2006 2:17 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| jefflowrey wrote: |
You should tell them that it is explicitly recommended NOT to set channel conversion on sender channels in cases where messages are known to have multiple hops.
This will cause them problems, eventually if not immediately.
Then tell them that if they insist on doing this, you are not responsible for the results. |
I had sinned (inadvertently however: I did not know the channel had been created with conversion on) by passing a message from AIX to the mainframe and back to another AIX box : Multihop from AIX to AIX over the mainframe.
Multihop did not work correctly until I removed the conversion exit from the channel.
Enjoy 
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