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Can CICS flip across LPAR at runtime

 
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tomehta

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Joined: 18 Aug 2008
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Location: India

PostPosted: Tue Jul 07, 2009 7:19 pm    Post subject: Can CICS flip across LPAR at runtime
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Hi
I have a basic question,
Can CICS flip across LPAR at runtime. I strongly feel its not possible. Which CICS manual I cna find a answer, I am looking into configration, hav'nt found much.
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dick scherrer

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PostPosted: Tue Jul 07, 2009 8:58 pm    Post subject:
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Hello,

I have no idea what you mean by "flip across", but our CICS regions have no gymnastic/acrobatic skills. They are more like jugglers - stay in their place and handle many "things" without dropping them.

I'm not sure there is a manual that will explain non-standard "things" that cics does not support. . .

If you explain what you want to do, someone may have a suggestion about how what you want to do might be accomplished.
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Bill O'Boyle

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Joined: 14 Jan 2008
Posts: 2502
Location: Atlanta, Georgia, USA

PostPosted: Wed Jul 08, 2009 3:15 am    Post subject: Reply to: Can CICS flip across LPAR at runtime
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CICSPLEX's are defined (by your friendly z/OS-MVS and CICS System Programmer) to "group" LPAR's together as one "Image", then using the "z/OS-MVS Coupling Facility" for VSAM I-O. DB2 is DB2 and that's a different animal.

CICSPLEX's can be very complex and require a great understanding of network topology to succeed and must be planned well.

Without expounding too much, there's much to it.

I'd suggest speaking with your Management as well as your System Programmer's if there's a legitimate business need.

HTH....

Regards,
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tomehta

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PostPosted: Fri Jul 10, 2009 4:31 pm    Post subject:
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Thanks Bill,
Following is my understanding from your post,
CICSPLEX will be required if the CICS have to run on more than one LPAR at runtime. This uses the coupling facility of z/os.

when we have sysplex in place, this does not ensure that cicsplex is also in place. for cicsplex, for complex things need to be done.

Please let me know if i got it right.

many thanks
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dick scherrer

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PostPosted: Fri Jul 10, 2009 7:12 pm    Post subject:
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Hello,

Many (most) CICS regions are "stand-alone" on systems i've worked on.

You need to identify what business requirement there is to "group" multiple lpars.
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tomehta

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PostPosted: Sat Jul 11, 2009 1:48 am    Post subject:
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Thats my original question, is there any technical constraint for cics to be stand alone on single LPAR.or in other words, without recycling the cics can it run on different LPARs. What i got from Bill's reply is like sysplex, cicsplex can be created, but its a complex thing.
Quote:
Many (most) CICS regions are "stand-alone" on systems i've worked on


requirement is load balancing across LPARs.

thanks for your valuable inputs.
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Bill O'Boyle

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Posts: 2502
Location: Atlanta, Georgia, USA

PostPosted: Sat Jul 11, 2009 2:20 am    Post subject: Reply to: Can CICS flip across LPAR at runtime
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You can search the IBM Redbooks for CICSPLEX (or any other topic for that matter) and you'll get many hits -

http://www.redbooks.ibm.com

Redbooks are a great source of IBM insight and best of all, the information is FREE and you can't do much better than that.... icon_wink.gif

Regards,
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dick scherrer

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PostPosted: Sat Jul 11, 2009 2:41 am    Post subject:
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Hello,

Quote:
requirement is load balancing across LPARs.
Unfortunately, there is no generic magic bullet for balancing icon_smile.gif

Is the new application (the one now being run in parallel), the source of load balancing concerns? How well does the existing application perform? What is being done for load balancing on the existing application? Does the replacement system require significantly more system resources?

If so, suggest the new modules/database(s) be looked at very closely to determine why more resources are needed.
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tomehta

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PostPosted: Sat Jul 11, 2009 3:08 am    Post subject:
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thanks Bill,Dick , I will dig into the cicsplex.

cheers
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