Answer / kalyan rakesh

VSAM groups logical records into blocks called control
interval.
control intervals are inturn grouped into control areas.

A control interval consists of 1)data records
2)free space
3)unused space
4)control information of
a)RDF
b)CIDF
collection of adjacent CI s is CA.

Answer / rameez akhtar

In vsam data sets data is stored in CIs & CAs, CI is small
unit and CA is big unit, a ca contain more then one CIs, CI
have four components
Data
CISF
RDF
Free space
CA also have free space in between records, that space is
used when new records added to the data set can not fit in
the free space of CIs.

Answer / rohan

Area occupied by the vsam cluster is divided into contiguous area called as control interval.
Area occupied by the control interval is known as control area.

to use the rewrite command, how should the vsam file be opened?

0 Answers   IBM,

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difference between vsam and database tables

0 Answers   IBM,

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What is Control Interval, Control Area ?

1 Answers   L&T,

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What is an alternate index and path ?

2 Answers   Infosys, TCS,

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name a few common vsam status codes?

0 Answers   IBM,

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Suppose a generation of GDG gets created in a particular step of a proc. How would you refer the current generation in a subsequent step? What would be the disposition of this generation now ?

4 Answers   Patni,

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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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Do primary key values have to be unique? Do alternate key values have to be unique?

1 Answers  

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What is the catalog?

1 Answers  

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Suppose a generation of GDG gets created in a particular step of a proc. How would you refer the current generation in a subsequent step? What would be the disposition of this generation now?

3 Answers  

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How to get the last record in vsam file in cluster?

0 Answers  

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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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