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| pshan81 |
 Posted: Wed Nov 05, 2008 12:47 am Post subject: Heart beat Interval & Disconnect Interval |
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Acolyte
Joined: 24 May 2005
Posts: 72
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Hi,
I have a sender channel called QM1.QM2 connecting qmgrs QM1 & QM2.The DISCINT is set to 6000 seconds and HBINT is set to 600 seconds.
| Quote: |
| HBINT is the time, in seconds, between heartbeat flows passed from the sending MCA when there are no messages on the transmission queue. The heartbeat exchange gives the receiving MCA the opportunity to quiesce the channel.It can disconnect the channel without waiting for the disconnect interval to expire. |
The channel is stopped only when there are no messages in the transmission queue for 6000 seconds.The channel is not disconnected after the HBINT seconds. why???
Is disconnect different from channel going down
Is it possible to find any trace for the flow of heartbeat messages? |
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| atheek |
| Posted: Wed Nov 05, 2008 2:31 am Post subject: |
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Partisan
Joined: 01 Jun 2006
Posts: 327
Location: Sydney
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If I understand it correctly, heartbeat messages are of a keep alive sort which helps a particular end of the connection to know that the other end is alive. If receiver end doesn't receive a hertbeat message within the configured interval, it knows that sender end has died and free the socket without waiting for DISCINT to expire
If both ends are live , channel will end only after DISCINT expires.
You can use a network packet snoop tool to detect heartbeat messages ( eg. snoop in unix platform) |
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| pshan81 |
| Posted: Wed Nov 05, 2008 4:23 am Post subject: |
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Acolyte
Joined: 24 May 2005
Posts: 72
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Thanks atheek.
I started the channel QM1.QM2,waited for 1 min,ensured both SDR and RCVR were running,stopped the SDR channel and checked the status of the RCVR immediately.The RCVR channel was also down.
Assuming the MCA has sent the first heart beat message within a minute after starting the channel,the receiver should go down only after few seconds rt?? |
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| atheek |
| Posted: Wed Nov 05, 2008 4:40 am Post subject: |
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Partisan
Joined: 01 Jun 2006
Posts: 327
Location: Sydney
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If you stop the channel, the channel will be down at both ends sender and receiver.
DISCINT and HBINT applies for running channels. Running channels doesn't mean its transferring messages. DISCINT and HBINT offers ways to release unused resources : ie channel is running but not transferring messages for a certain period, then the channel can be brought down relasing the resources. |
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| Bill.Matthews |
| Posted: Wed Nov 05, 2008 8:46 am Post subject: Channel Management and MD0C |
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Master
Joined: 23 Sep 2003
Posts: 232
Location: IBM (Retired)
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Take a look at support pac MDOC - it has lots of details on various aspects of "channel management".
Presentations dealing with this subject have been given for many years at the Tech Conferences and a SHARE (and GUIDE - when it still existed).
_________________
Bill Matthews |
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| pshan81 |
| Posted: Thu Nov 06, 2008 9:49 pm Post subject: |
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Acolyte
Joined: 24 May 2005
Posts: 72
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Thanks Bill Matthews.
I did a search for the support pac MDOC in Google and IBM.I didn't get any.Could you please share the link or presentations related to it |
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| exerk |
| Posted: Fri Nov 07, 2008 1:29 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| pshan81 wrote: |
Thanks Bill Matthews.
I did a search for the support pac MDOC in Google and IBM.I didn't get any.Could you please share the link or presentations related to it |
Try MD0[zero]C, which can be found here
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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