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| bruce2359 |
 Posted: Wed Sep 19, 2012 9:35 am Post subject: |
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Poobah
Joined: 05 Jan 2008
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Location: US: west coast, almost. Otherwise, enroute.
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So, back to your original question - the subject of this post: What is the maximum number of clusters on a Queue Manager?
A full-repository queue manager is limited to the maximum number of cluster names that can be specified in the queue managers namelist object.
A partial-repository does not explicitly name clusters it is part of, so the namelist restriction does not apply. Someone from IBM might want to chime in here to offer an answer.
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 10:30 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Joined: 04 Sep 2012
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| exerk wrote: |
This is a meaningless statement, please clarify what you mean. |
Now I am also doubtful that IBM allows or not 255 clusters in a namelist.
I mean to say that I have a QM in which we have a reposnl containing a namelist. This namelist has 253 clusters in it. SO this QM is acting as a full repos for these 253 clusters. |
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 10:37 am Post subject: What is the maximum number of clusters on a Queue Manager? |
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Joined: 04 Sep 2012
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| bruce2359 wrote: |
A full-repository queue manager is limited to the maximum number of cluster names that can be specified in the queue managers namelist object.
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So can you tell me what can be the maxmimum number of cluster names that can be specified in the queue manager namelist object which I came to know is 255 but hasn't got a link yet?
Regards,
Ethan
Quote: Life is ofcourse beautiful without Problems but Problem helps you in making your life beautiful |
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| bruce2359 |
| Posted: Wed Sep 19, 2012 10:42 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| ethanlokesh wrote: |
| exerk wrote: |
This is a meaningless statement, please clarify what you mean. |
Now I am also doubtful that IBM allows or not 255 clusters in a namelist.
I mean to say that I have a QM in which we have a reposnl containing a namelist. This namelist has 253 clusters in it. SO this QM is acting as a full repos for these 253 clusters. |
If you specified the name of the namelist in the queue manager REPOSNL attribute, AND you specified that the queue manager is to be a full-repository, then it will be an FR for the list of clusters named in the namelist.
Why are you doubtful?
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 10:47 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Joined: 04 Sep 2012
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| Vitor wrote: |
- Accept this is an outcome of your design and suck it up, with a plan to move to bigger hardware
- Raise a PMR and report unacceptably poor performance in this scenario & see if IBM can fix the processes in a future release |
Thanks Vitor,
Haven't got a link yet but let me see if I can get the link I ll share with you for sure. 
Yeah I am also having the same perception that it is an outcome of the rigourous testing done on the clusters at one time.
Let me check but thanks a lot!!!!
I got the link:...
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=%2Fcom.ibm.mq.csqzaj.doc%2Fsc11120_.htm
Regards,
Ethan
Quote: Life is ofcourse beautiful without Problems but Problem helps you in making your life beautiful
Last edited by ethanlokesh on Wed Sep 19, 2012 11:16 am; edited 1 time in total |
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 10:59 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Novice
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| ethanlokesh wrote: |
Now I am also doubtful that IBM allows or not 255 clusters in a namelist. |
| exerk wrote: |
| Why are you doubtful? |
I am doubtful about the max no of clusters allowed by IBM in a namelist is 255.
Regards,
Ethan
Quote: Life is ofcourse beautiful without Problems but Problem helps you in making your life beautiful |
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| bruce2359 |
| Posted: Wed Sep 19, 2012 11:05 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| ethanlokesh wrote: |
| ethanlokesh wrote: |
Now I am also doubtful that IBM allows or not 255 clusters in a namelist. |
| exerk wrote: |
| Why are you doubtful? |
I am doubtful about the max no of clusters allowed by IBM in a namelist is 255. |
256.
From the InfoCenter http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=%2Fcom.ibm.mq.csqzaj.doc%2Fsc11120_.htm
| Quote: |
NAMES(name, …)
List of names.
The names can be of any type, but must conform to the rules for naming WebSphere MQ objects, with a maximum length of 48 characters.
An empty list is valid: specify NAMES(). The maximum number of names in the list is 256. |
_________________
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.
Last edited by bruce2359 on Wed Sep 19, 2012 11:06 am; edited 1 time in total |
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 11:05 am Post subject: What is the maximum number of clusters on a Queue Manager? |
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Novice
Joined: 04 Sep 2012
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| bruce2359 wrote: |
| Was CPU utilization always high? If not, what changes were made just prior to CPU going to 98%? |
We had added clusters that's it.
Regards,
Ethan
Quote: Life is ofcourse beautiful without Problems but Problem helps you in making your life beautiful |
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| bruce2359 |
| Posted: Wed Sep 19, 2012 11:07 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| ethanlokesh wrote: |
| bruce2359 wrote: |
| Was CPU utilization always high? If not, what changes were made just prior to CPU going to 98%? |
We had added clusters that's it. |
Please provide us with details.
Exactly how many clusters did you add 2, 20, 200?
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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. |
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| ethanlokesh |
| Posted: Wed Sep 19, 2012 11:09 am Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Joined: 04 Sep 2012
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[quote="bruce2359"]256.
From the InfoCenter http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=%2Fcom.ibm.mq.csqzaj.doc%2Fsc11120_.htm
| Quote: |
NAMES(name, …)
List of names.
The names can be of any type, but must conform to the rules for naming WebSphere MQ objects, with a maximum length of 48 characters.
An empty list is valid: specify NAMES(). The maximum number of names in the list is 256. |
Thanks Bruce!!!
Regards,
Ethan
Quote: Life is ofcourse beautiful without Problems but Problem helps you in making your life beautiful |
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| bruce2359 |
| Posted: Wed Sep 19, 2012 11:24 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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Please provide us with details.
Exactly how many clusters did you add 2, 20, 200?
_________________
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| RangaKovela |
| Posted: Wed Sep 19, 2012 11:54 am Post subject: |
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Joined: 10 May 2011
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From above thread I understand, Queue manager is acting as Full repository for 253 clusters and at the same time partial repository for another 200 cluster with each cluster having atleast 5 queue managers as members. This seems to one of its kind architecture, however queue manager seems to be shared across various applications which lead queue manager to grow in massive and uncontrollable way. I am sure this is not production environment. It must be test env where designer might have allocated new clusters for every interface instead of reusing them. Yes, Bad design...
However Lokesh question seems to be interesting .. Is there any limit on Number of clusters (FR/PR or both) that Queue manager can host ? Yes, indeed this is limited to the physical resources availability . How can we determine this number? Do we have any IBM performance reports on this? |
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| exerk |
| Posted: Wed Sep 19, 2012 12:45 pm Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| RangaKovela wrote: |
| From above thread I understand, Queue manager is acting as Full repository for 253 clusters and at the same time partial repository for another 200 cluster... |
I think you mean PR in another 200 clusters.
| RangaKovela wrote: |
| However Lokesh question seems to be interesting .. Is there any limit on Number of clusters (FR/PR or both) that Queue manager can host ? Yes, indeed this is limited to the physical resources availability... |
No, it's not limited by physical resource availability (although it might be on an under-specified server), it's limited by the 256-name limit of the namelist - and a queue manager does not host clusters, it is a member of one or more clusters.
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| RangaKovela |
| Posted: Wed Sep 19, 2012 1:00 pm Post subject: |
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Apprentice
Joined: 10 May 2011
Posts: 38
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| Quote: |
| I think you mean PR in another 200 clusters. |
Yes, PR in 200 clusters. Thanks for correction.
| Quote: |
| No, it's not limited by physical resource availability (although it might be on an under-specified server), it's limited by the 256-name limit of the namelist |
I was referring to both PR and FR. Queue manager can be PR in another 200 clusters .... This number is not governed by limit on namelist. to some extent MaxActivechannels configured in qm.ini whose configuration is again limited by physical resources availability.
Question still remains - Can queue manager part of 400 clusters? Any performance implications on Queue manager.. |
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| Vitor |
| Posted: Wed Sep 19, 2012 1:08 pm Post subject: Re: What is the maximum number of clusters on a Queue Manage |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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a) That's a link for WMQv6 InfoCenter, which you shouldn't be refering to because you shouldn't be using that version of WMQ
b) That link just says what the maximum number of entries in a namelist is, which is not in dispute. I'm looking for the link which supports your assertion that having 253 entries in a REPSONL namelist is an "IBM standard".
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Insanity is the best defence. |
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