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

what is the concept of IMPORT in vsam??

2 Answers  

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explain how many ways you can load data in a vsam cluster?

0 Answers   IBM,

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What is a lds (linear data set) and what is it used for?

0 Answers  

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What is the use of lds (linear data set)?

0 Answers  

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Explain about the file objects in vsam?

0 Answers  

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What are the steps involved in access method services?

0 Answers  

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Suppose 3 generations of a GDG exist. How would you reference the 1st generation in the JCL?

2 Answers   IBM,

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Can we copy Vsam files from a Vsam file in Iebgener step?

4 Answers   iGate, Tech Mahindra,

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By looking into the Jcl can we identify the dataset is VSAM?

5 Answers   Cognizant, Keane India Ltd,

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Common VSAM Error conditions and codes

1 Answers  

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How to declare the EMP Name, EMP No., DOB in VSAM KSDS file? Please explain.....

3 Answers   CTS,

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When CISZ is declared as 4096 at cluster level,is this true that data will have 4096 and index will have default?????

1 Answers   Wipro,

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