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| Multiple Listeners on z/OS |
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| mq one |
 Posted: Wed Apr 14, 2004 7:00 pm Post subject: Multiple Listeners on z/OS |
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Newbie
Joined: 14 Apr 2004
Posts: 6
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We are using WMQ 5.2 and are trying to use more than one listener. The manual is saying "There can only be a single channel initiator connected to a queue manager" but it always talks about Listeners (plural). If it is possible to have more than one listener (of course different port) where will I put the configuration? (CSQINP?) and how?
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| Posted: Thu Apr 15, 2004 3:27 am Post subject: |
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Master
Joined: 20 Jun 2002
Posts: 222
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MQ ONE,
You can have the same chan initiator listening on 2 (or how ever many) TCP ports you define. <i.e. port 1414, 1415,.....>
As for where you would put it.
You should have an MQ parmlib with a CSQ4DISP member <or similar, depending on your sites naming conventions> this is where you define the port number for TCP to listen. Secondly, <which is what you are referring to>, in SYS1.PROCLIB there should be a member xxxxMSTR member that has a CSQINP2 step. In this step point to you CSQ4DISP member.
Your proclib member should look similar to this:
//CSQINP2 DD DSN=SY.MQM.MQZZ.T1.PARMLIB(CSQ4INSG),DISP=SHR
// DD DSN=SY.MQM.MQTT.PARMLIB(CSQ4INSX),DISP=SHR
// DD DSN=SY.MQM.MQTT.PARMLIB(CSQ4INYG),DISP=SHR
// DD DSN=SY.MQM.MQTT.PARMLIB(CSQ4DSP),DISP=SHR
Not sure what will gain you if you loose your TCP stack. If the TCP stack goes down, then neither port will be available.
More than likely whay IBM is referring to when they say multiple listeners is having TCP listener along with an LU 6.2 listener attached to the same QMGR. This way if the TCP listener goes down, the LU 6.2 listener is available for work. To get this working this is some addition configurations that will need setup.
BTW: This is all in the MQ for z/OS System Setup Guide. |
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