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| Heba_MQ |
 Posted: Fri Oct 02, 2020 9:02 am Post subject: MQI vs Message Channels |
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Apprentice
Joined: 19 Apr 2020
Posts: 39
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Dears
Is there any reason behind that the MQI Channels works bi-directionally and the message channel is still one way ?
Thanks
Heba |
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| PaulClarke |
| Posted: Fri Oct 02, 2020 9:54 am Post subject: |
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Grand Master
Joined: 17 Nov 2005
Posts: 1002
Location: New Zealand
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There are probably lots of reasons. It was certainly considered at one point to have a bi-directional mode with a transmission queue at either end but it never got sufficient traction. I guess the customer need was never strong enough.
Why ? Do you have a problem which would require a bi-directional channel to solve ?
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Paul Clarke
MQGem Software
www.mqgem.com |
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| Heba_MQ |
| Posted: Tue Oct 06, 2020 3:08 am Post subject: |
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Apprentice
Joined: 19 Apr 2020
Posts: 39
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Thanks Paul...
No - actually new projects do not use message channels anyway, i was just wondering since the technology allows 2way MQI channels...why same is not not unified across the message channels as well...it would make a lot of things simpler...
Thanks
Heba |
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| PaulClarke |
| Posted: Tue Oct 06, 2020 3:17 am Post subject: |
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Grand Master
Joined: 17 Nov 2005
Posts: 1002
Location: New Zealand
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Well I guess it is debatable whether things would be made simpler on balance. There are certainly advantages to the idea that if QMA can send to QMB then QMB can automatically send to QMA. However, there would be ramifications, such as security, performance, and an increased complexity in the 'single' object that you define. I suspect it would also affect the way cluster channels would operate. It is rare that ANY decision concerning design doesn't have winners and losers. For some people it would be just what they need; for others it would raise more questions than it answered. I suspect it was for these reasons that it was never implemented.
Cheers,
Paul.
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Paul Clarke
MQGem Software
www.mqgem.com |
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| gbaddeley |
| Posted: Tue Oct 06, 2020 2:38 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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MQI channels are basically encapsulated calls and returns for MQI functions, which is quite different to the protocol on distributed channels. (As Paul would know so well  )
Its one of those MQ things that has stood the test of time.
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Glenn |
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