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Why are CICS regions shutdown on daily intervals?

 
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superk

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Joined: 26 Apr 2004
Posts: 4648
Location: Raleigh, NC, USA

PostPosted: Thu Oct 04, 2007 9:12 pm    Post subject: Why are CICS regions shutdown on daily intervals?
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In every shop I've worked in prior to the current shop, selected CICS regions were typically shutdown after business hours in an effort to free up CPU cycles for the nighttime batch processes. Then, they would be restarted the following morning before the start of business. Many more regions stayed up 24x7x365.

In the current shop, almost all regions are shutdown at various points during the night, then restarted the following morning. I'm told this is NOT done to free up CPU cycles. Why then would our two Command Centers want to do this (I have to code for the ever-hanging schedules, which is why I'm interested)?
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ofer71

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Joined: 27 Dec 2005
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Location: Israel

PostPosted: Fri Oct 05, 2007 1:08 am    Post subject:
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In my shop, this is done when transaction files are updating the main database files during the nightly cycle. It ensures no one is updating the transaction files during the cycle.

O.
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dick scherrer

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Joined: 23 Nov 2006
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PostPosted: Fri Oct 05, 2007 7:10 am    Post subject:
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Hello,

At several of the places i've been, this is the "nightly batch window". It is also when new/modified online modules are "rolled in". Less often these days, but once was when backups of online files were taken.

When your operating plan is built around this scheme, it lasts for a long time.
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Earl

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Joined: 17 Jun 2007
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Location: oklahoma

PostPosted: Fri Oct 05, 2007 7:15 am    Post subject:
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I posted an article on CICS 24x7 Technology that might be of interest>> www.pcs305.com
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diwa_thilak

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Joined: 13 Jul 2006
Posts: 205
Location: At my desk

PostPosted: Fri Oct 05, 2007 10:56 am    Post subject: Reply to: Why are CICS regions shutdown on daily intervals?
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Hi,

In my Shop, we have payroll system (Online screens to book hours) which will maintain the hours booked by customers. Our nightly batch which will perform the payroll processing will close the files allocated o the online system and creates payroll.

Main reason for closing the regions would enable the batch processing to take up.

Apart from this , as you told CPU cycles, recycling works are done.
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