Answer / guest

Control Interval is analogous to a physical block for QSAM
files. It is the unit of I/O. Must be between 512 bytes to
32 k. Usually either 2K or 4K. A larger control interval
increases performance for sequential processing while the
reverse is true for random access. Under CICS when a record
is locked, the entire CI gets locked.

Control Area is a group of control intervals. CA is used
during allocation. CA size is calculated based on the

allocation type (cyl, tracks or records) and can be max of 1
cylinder

in a cobol select statement for a ksds can you tell me what are the 3 possibilities for access?

0 Answers   IBM,

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Define base cluster?

0 Answers  

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How to get the last record in vsam file in cluster? And how can u get the ksds file records into cobol program?

0 Answers  

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What makes vrrds different from vsam?

0 Answers  

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How do you load a VSAM data set with records ?

2 Answers  

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Is a delete operation possible in an ESDS?B. Is rewrite operation possible in ESDS ?

3 Answers  

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How do you define an ALTINDX ? How do you use ALTINDXs in batch, CICS pgm?s ?

2 Answers   IBM,

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how yo view the vsam file?

5 Answers   DSRC, TCS,

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What are the optional parameters to the input dataset While loading the empty cluster with the data records?

1 Answers   IBM,

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What is the function of entry sequenced data set?

0 Answers  

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In the COBOL SELECT statement what is the ORGANIZATION for a KSDS?

4 Answers  

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Common VSAM Error conditions and codes

1 Answers  

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