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CICS EDSA technical definition

 
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APD1

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Joined: 18 Feb 2009
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PostPosted: Wed Mar 18, 2009 7:17 pm    Post subject: CICS EDSA technical definition
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Hi


I know that EDSA is the extended Dynamic storage area but waht would be a better technical definition to it ?
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APD1

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PostPosted: Wed Mar 18, 2009 7:17 pm    Post subject:
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I mean I need a better detail explaination
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enrico-sorichetti

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PostPosted: Wed Mar 18, 2009 7:22 pm    Post subject: Reply to: CICS EDSA ?
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You will never find it by posting into the CLIST & REXX forum

did You care to look at the cics docs

starting for example from ....

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/Shelves/DFHASJ00
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Robert Sample

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PostPosted: Wed Mar 18, 2009 7:23 pm    Post subject:
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Googling "CICS EDSA" rapidly leads to ...
Quote:
The dynamic storage areas

The dynamic storage areas are used to supply CICS® tasks with the storage needed to execute your transactions. From the storage size that you specify on the DSALIM and the EDSALIM parameters, CICS allocates the dynamic storage areas above and below the line respectively.

Too small a dynamic storage area results in increased program compression or, more seriously, SOS (short on storage) conditions, or even storage deadlock abends when program compression is not sufficient.

DSAs consist of one or more extents. An extent below the line is 256KB and above the line, 1MB (except UDSA with TRANISO active, when the extent is 1M).

CICS GETMAIN requests for dynamic storage are satisfied from one of the following: the CDSA, UDSA, SDSA, ECDSA, , EUDSA, or the ESDSA during normal execution. The sizes of the dynamic storage areas are defined at CICS initialization, but the use of storage within them is very dynamic.

The dynamic storage areas consist of a whole number of virtual storage pages allocated from a number of MVS™ storage subpools. CICS uses about 180 storage subpools, which are located in the dynamic storage areas. For a list of the subpools see the tables in topics Table 255 through Table 260. Each dynamic storage area has it own "storage cushion" These subpools (including the cushion) are dynamically acquired, as needed, a page at a time, from within the dynamic storage area.

The "estended" means above the line.
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Earl Haigh

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PostPosted: Thu Mar 19, 2009 3:22 am    Post subject:
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This sounds like another interview question.
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APD1

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PostPosted: Thu Mar 26, 2009 12:03 pm    Post subject:
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Thanks for the explainations .....it was not a an interview questions.......it is a leraner's question who is pretty new to the world of CICS.....thanks again
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