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

During processing of a VSAM file, some system error occurs and it is subsequently unusable . What do you do ?

1 Answers  

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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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What is a cluster?

2 Answers  

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What is SHAREOPTS ?

2 Answers  

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can alternate index use in ESDS since it does not contain primary index? if yes can you explain?

3 Answers   Temenos,

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what do you mean by a shareoptions parameter (shr) in define cluster command?

0 Answers   IBM,

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what's the biggest disadvantage of using a VSAM dataset?

8 Answers   Anjana, CTS, DSRC, IBM,

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Explain about the file objects in vsam?

0 Answers  

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What is a CI, control interval?

3 Answers  

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There are at least seven IDCAMS commands; name and explain each of them ?.

1 Answers  

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Is CA(Control Area) is part of CI(Control Interval)

3 Answers  

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What is Base Cluster ?

1 Answers  

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