File Concept

The Disposition Parameter in the JCL is Share ( DISP=SHR ) and Cobol program opens file in " Extend " mode. In this scenarion what will happen to that file?

anjireddy1985
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Jan 6th, 2010
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COBOL

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jedianiki

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Member Since Mar-2010 | Mar 24th, 2010

The DISP=SHR in JCL means that the file is already existing and that it is not exclusively locked for your own use. Other user can still access this file. And the EXTEND in the COBOL program means that, when you open the file, the record pointer will be positioned on the last row of the record and every insert you'll make will be appended on the last position of the file.

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harini12.harini
Profile Answers by harini12.harini

Jan 31st, 2010

If we open file in xtend mode, then old data will not lose, we append the new data without losing old data.

pkraja101
Profile Answers by pkraja101 Questions by pkraja101

Feb 6th, 2010

In this time it will respond to the COBOL program and we can successfully write in the old source program.

jedianiki
Profile Answers by jedianiki

Mar 24th, 2010

The DISP=SHR in JCL means that the file is already existing and that it is not exclusively locked for your own use. Other user can still access this file. And the EXTEND in the COBOL program means that, when you open the file, the record pointer will be positioned on the last row of the record and every insert you'll make will be appended on the last position of the file.