Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Limit in Length for a CICS START

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS
View previous topic :: :: View next topic  
Author Message
seahawk789

New User


Joined: 22 Feb 2010
Posts: 56
Location: Cochin

PostPosted: Mon Apr 02, 2018 8:34 pm    Post subject: Limit in Length for a CICS START
Reply with quote

Hi Team,

In the manuals I read the following description about Length, but its mentioned upper limit is 32K but assume a 24KB limit in some cases. But I am not sure what those cases are where we should use 24KB instead of 32KB. Can someone please clarify or is it always safe to assume the length in START command can be max of 24KB ?

"When a CICSĀ® command offers the LENGTH option, it is expressed as a signed halfword binary value. This puts a theoretical upper limit of 32 763 bytes on LENGTH. In practice, depending on issues of recoverability, function shipping, and other factors, assume a 24 KB limit."


Code:
EXEC CICS START
     TRANSID('TRN2')
     FROM(DATAFLD)
     LENGTH(100)
END-EXEC

[/code]
Back to top
View user's profile Send private message

Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8376
Location: Dubuque, Iowa, USA

PostPosted: Mon Apr 02, 2018 9:15 pm    Post subject: Reply to: Limit in Length for a CICS START
Reply with quote

Use an upper limit of 24KB -- the manual does not lie to you.
Back to top
View user's profile Send private message
seahawk789

New User


Joined: 22 Feb 2010
Posts: 56
Location: Cochin

PostPosted: Mon Apr 02, 2018 10:57 pm    Post subject: Re: Reply to: Limit in Length for a CICS START
Reply with quote

Robert Sample wrote:
Use an upper limit of 24KB -- the manual does not lie to you.


Thanks Bob. But I was wondering why the theoretical value of 32K cannot be used ?
Back to top
View user's profile Send private message
Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8376
Location: Dubuque, Iowa, USA

PostPosted: Tue Apr 03, 2018 12:01 am    Post subject: Reply to: Limit in Length for a CICS START
Reply with quote

I don't go by "Bob" -- my name is Robert.

The manual says for recoverability and function shipping and other factors -- so presumably recoverability, function shipping, etc. reduces the 32K down to 24K.
Back to top
View user's profile Send private message
seahawk789

New User


Joined: 22 Feb 2010
Posts: 56
Location: Cochin

PostPosted: Tue Apr 03, 2018 12:04 am    Post subject: Re: Reply to: Limit in Length for a CICS START
Reply with quote

Robert Sample wrote:
I don't go by "Bob" -- my name is Robert.

The manual says for recoverability and function shipping and other factors -- so presumably recoverability, function shipping, etc. reduces the 32K down to 24K.


Thank you Robert. I will use 24k then. I was not familiar with the terminology "function shipping"
Back to top
View user's profile Send private message
Robert Sample

Global Moderator


Joined: 06 Jun 2008
Posts: 8376
Location: Dubuque, Iowa, USA

PostPosted: Tue Apr 03, 2018 12:44 am    Post subject:
Reply with quote

Function shipping has been part of CICS for a number of years. It allows a local CICS transaction to use resources in another CICS region (for example). There obviously is some overhead required to allow such functionality to occur.
Back to top
View user's profile Send private message
seahawk789

New User


Joined: 22 Feb 2010
Posts: 56
Location: Cochin

PostPosted: Tue Apr 03, 2018 1:11 am    Post subject:
Reply with quote

Robert Sample wrote:
Function shipping has been part of CICS for a number of years. It allows a local CICS transaction to use resources in another CICS region (for example). There obviously is some overhead required to allow such functionality to occur.


Thank You so much for clarifying.
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Send data from a CICS TS program to M... spiThingy CICS 2 Wed Aug 08, 2018 8:58 am
No new posts Error while initiation CICS program f... Ashishpanpaliya CICS 3 Mon Jul 16, 2018 5:12 pm
No new posts CICS startup problem John Poulakos CICS 3 Tue Jun 12, 2018 9:08 pm
No new posts How do you attach a DB2 plan to a CIC... John Poulakos DB2 0 Wed Apr 18, 2018 1:49 am
No new posts Call COBOL or PLI with a click from w... vaibhav gs All Other Mainframe Topics 1 Mon Apr 16, 2018 7:29 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us