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MQSeries.net Forum IndexGeneral IBM MQ SupportMQI vs Message Channels

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Heba_MQ
PostPosted: Fri Oct 02, 2020 9:02 am Post subject: MQI vs Message Channels Reply with quote

Apprentice

Joined: 19 Apr 2020
Posts: 27

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
PostPosted: Fri Oct 02, 2020 9:54 am Post subject: Reply with quote

Guardian

Joined: 17 Nov 2005
Posts: 977
Location: New Zealand

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
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Heba_MQ
PostPosted: Tue Oct 06, 2020 3:08 am Post subject: Reply with quote

Apprentice

Joined: 19 Apr 2020
Posts: 27

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...

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Heba
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PaulClarke
PostPosted: Tue Oct 06, 2020 3:17 am Post subject: Reply with quote

Guardian

Joined: 17 Nov 2005
Posts: 977
Location: New Zealand

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
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gbaddeley
PostPosted: Tue Oct 06, 2020 2:38 pm Post subject: Reply with quote

Jedi

Joined: 25 Mar 2003
Posts: 2175
Location: Melbourne, Australia

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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