Answer / sanjudharan

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

Can you delete vsam files with the delete option of the disposition parameter of jcl?

0 Answers   IBM,

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what is reuse parameter ?

3 Answers   Polaris, Xansa,

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what is vsam catalog ?

2 Answers   Tech Mahindra,

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If you wish to use the REWRITE command haw must the VSAM file be opened?

1 Answers  

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What is the place for VSAM KSDS?

0 Answers  

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Is it slower if you access a record through alt index as compared to primary index?

0 Answers  

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By seeing a program how we findout it is a VSAM program?

6 Answers   TCS,

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Explain what are the optional parameters to the input dataset while loading the empty cluster with the data records?

0 Answers  

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What is the function of linear dataset in vsam?

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How do you define a KSDS ?

1 Answers   IBM,

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what is the use of reuse in vsam?

3 Answers  

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What does the keyranges parameter in define cluster commends do?

0 Answers  

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