| |
|
RSS Feed - WebSphere MQ Support
|
RSS Feed - Message Broker Support
|
  |
|
| Why only one CLSSDR channel on a cluster PR qmgr? |
« View previous topic :: View next topic » |
| Author |
Message
|
| pcelari |
 Posted: Wed Mar 16, 2022 9:57 am Post subject: Why only one CLSSDR channel on a cluster PR qmgr? |
 |
|
Chevalier
Joined: 31 Mar 2006
Posts: 411
Location: New York
|
Greetings...
the documentation says when adding a qmgr as PR in a cluster, one CLSSDR channel to EITHER of the two FR qmgrs must be created.
Is there a reason not to create one CLSSDR channel to each of the FR qmgrs?
_________________
pcelari
-----------------------------------------
- a master of always being a newbie |
|
| Back to top |
|
 |
| bruce2359 |
| Posted: Wed Mar 16, 2022 11:10 am Post subject: |
|
|
Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
|
For what purpose? If the primary FR fails, clustering software on a PR will automatically create a CLUSSDR channel to the remaining FR.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
|
| Back to top |
|
|
| pcelari |
| Posted: Wed Mar 16, 2022 11:21 am Post subject: |
|
|
Chevalier
Joined: 31 Mar 2006
Posts: 411
Location: New York
|
| bruce2359 wrote: |
| For what purpose? If the primary FR fails, clustering software on a PR will automatically create a CLUSSDR channel to the remaining FR. |
Thanks for clarifying! I have always just followed the manual, until I have a need to move a FR to a different qmgr. so came this question. Good to know. Never read about this capability in the manual though.
_________________
pcelari
-----------------------------------------
- a master of always being a newbie |
|
| Back to top |
|
|
| bruce2359 |
| Posted: Thu Mar 17, 2022 9:21 am Post subject: |
|
|
Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
|
|
| Back to top |
|
|
| hughson |
| Posted: Thu Mar 17, 2022 8:04 pm Post subject: |
|
|
Padawan
Joined: 09 May 2013
Posts: 1914
Location: Bay of Plenty, New Zealand
|
| bruce2359 wrote: |
| For what purpose? If the primary FR fails, clustering software on a PR will automatically create a CLUSSDR channel to the remaining FR. |
Just to clarify, the CLUSSDR channel to the remaining FR is not created when the primary FR fails, it is created when the PR first joins the cluster. If you use DISPLAY CLUSQMGR, you will see the PR has TWO CLUSSDR channels, one automatically created and one manually created.
All "cluster subscriptions" are made to TWO FRs all the time.
You are told only to make one manual one because using the model sent by the FR to the PR when it joins the cluster is more likely to be correct than a manual definition, so the fewer manual definitions the better. You obviously need to have a minimum of one manual definition because, you know, magic doesn't exist! 
Cheers,
Morag
_________________
Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
Get your IBM MQ training here!
MQGem Software |
|
| Back to top |
|
|
| bruce2359 |
| Posted: Fri Mar 18, 2022 7:51 am Post subject: |
|
|
Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
|
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
|
| Back to top |
|
|
| pcelari |
| Posted: Fri Mar 18, 2022 11:59 am Post subject: |
|
|
Chevalier
Joined: 31 Mar 2006
Posts: 411
Location: New York
|
| hughson wrote: |
Just to clarify, the CLUSSDR channel to the remaining FR is not created when the primary FR fails, it is created when the PR first joins the cluster. If you use DISPLAY CLUSQMGR, you will see the PR has TWO CLUSSDR channels, one automatically created and one manually created.
...
You are told only to make one manual one because using the model sent by the FR to the PR when it joins the cluster is more likely to be correct than a manual definition, so the fewer manual definitions the better. You obviously need to have a minimum of one manual definition because, you know, magic doesn't exist!
Morag |
thank you Morag for clarifying!
So it's my understanding now that the automatically created the CLUSSDR is not the same thing as the manually created one. A new CLUSSDR channel is NOT automatically replicated to point to a new FR.
As the manual states: after changing a FR qmgr, one must still "Replace all other manually defined cluster-sender channels that point to the old FR on all queue managers in the cluster with channels that point to either of the new FR qmgrs."
We still need to do the work...
_________________
pcelari
-----------------------------------------
- a master of always being a newbie |
|
| Back to top |
|
|
| bruce2359 |
| Posted: Fri Mar 18, 2022 12:07 pm Post subject: |
|
|
Poobah
Joined: 05 Jan 2008
Posts: 9396
Location: US: west coast, almost. Otherwise, enroute.
|
Yes, there is work to move/deprecate a cluster qmgr.
For every gmgr in the cluster there must be one manually defined CLUSRCVR that points back to itself, and one manually defined CLUSSDR to its FR.
The manually defined CLUSSDR will be replaced by a CLUSSDRB type channel indicating both manually-defined and automatically replaced.
When deprecating a qmgr from a cluster, the old CLUSSDR and CLUSRCVR channels need to be removed from the cluster.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
|
| Back to top |
|
|
|
|
|
| |
|
Page 1 of 1 |
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
|
|
