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pranav08
New User
Joined: 05 Sep 2010
Posts: 10
Location: noida
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| How would I design a system which is online 24x7 and can run batch programs in it too? |
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Garry Carroll
Senior Member
Joined: 08 May 2006
Posts: 1193
Location: Dublin, Ireland
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There are several options. Look at the EXCI option, for example.
Garry. |
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pranav08
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Joined: 05 Sep 2010
Posts: 10
Location: noida
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| Garry Carroll wrote: |
There are several options. Look at the EXCI option, for example.
Garry. |
Gary, is there any other way other than EXCI? |
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dbzTHEdinosauer
Global Moderator
Joined: 20 Oct 2006
Posts: 6966
Location: porcelain throne
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The best source of information for this topic can be found reading the manuals for CICS as well as the IBM webpages concerned with CICS.
yes, this means you have to spend some time looking instead of expecting us just to provide you with answers.
the fact that you think this rather complex and involved subject can be effectively answered thru a forum displays your total ignorance of this subject. |
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Garry Carroll
Senior Member
Joined: 08 May 2006
Posts: 1193
Location: Dublin, Ireland
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I've seen other approaches such as closing/opening files from batch by isuing CEMT commands. The disadvantage is that files/transactions will be unavailable while the batch using them is running.
GaRRy. |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
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| You could investigate DFSMStvs as an option |
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Bill O'Boyle
CICS Moderator
Joined: 14 Jan 2008
Posts: 2501
Location: Atlanta, Georgia, USA
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In addition to Expat's post, there are several 3rd-Party products which allow Batch and CICS simultaneous updates.
But, one product, CA's SHAREOPTION5, I would not recommend, unless they've fixed many of its outstanding pitfalls.
Bill |
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pranav08
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Joined: 05 Sep 2010
Posts: 10
Location: noida
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| expat wrote: |
| You could investigate DFSMStvs as an option |
Thank u, I'll explore this topic |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
Most places schedule one or more "windows" for batch update processing if the online system uses vsam.
If you really want 24x7 (which will still be unavailable sometime), switch the data to a database rather than vsam. We've been running concurrent batch and online update processes for 40 years. . . (yup, years and years before there even was db2) |
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Bill O'Boyle
CICS Moderator
Joined: 14 Jan 2008
Posts: 2501
Location: Atlanta, Georgia, USA
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Far and away, the most popular and widely-used 3rd-Party product for concurrent Batch/CICS update is SYSB II from H&W Computer Systems, Boise, Idaho -
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| http://www.hwcs.com/index.asp |
This product has been around before ECI/EXCI was introduced (CICS/ESA 4.1) and uses their own home-grown SVC's, allowing Batch updates to be directed to CICS under the covers.
Bill |
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enrico-sorichetti
Superior Member
Joined: 14 Mar 2007
Posts: 10873
Location: italy
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something that makes me wonder is the complete lack of good sense in some organizations
the true issue for 24/7 operation is the application design not the stupid technicalities on concurrent access and friends
what about different time zones for example,
the batch window even if accessing the <same> database should run taking into account the different office hours around the world
and other minutiae ( small or trifling matters ) like that  |
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Earl Haigh
Active User
Joined: 25 Jul 2006
Posts: 475
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parsesource
New User
Joined: 06 Feb 2006
Posts: 97
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| Garry Carroll wrote: |
I've seen other approaches such as closing/opening files from batch by isuing CEMT commands. The disadvantage is that files/transactions will be unavailable while the batch using them is running.
GaRRy. |
it depends.
we have apps that log to a vsam-file. to allow 24x7 with batch offload we added a simple logic to our apps. there are two files. the app writes to the first file, wich will work 99,9% of the time. if this does not work while file1 is closed (batch offload), it writes to file2. these files are never offloaded simultaneously. so there is no online+batch dependency. |
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Earl Haigh
Active User
Joined: 25 Jul 2006
Posts: 475
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| With BatchCICS connect (www.batchcics.com) , you can code your Batch programs to access any file in 1 or more CICS regions without closing files and/or disabling any transactions. |
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