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what's the biggest disadvantage of using a VSAM dataset?
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Answer / xyz
1. VSAM increases the disk space requirements. For self-
reorganization free space must be deliberately left.
2.Except for read-only the integrity of VSAM datasets in
cross region/system must be maintained by the user.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / sachin
THE BIGGEST DISADVANTAGE IS VSAM OCCUPIES MORE DASD SPACE
THAN NON VSAM
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / avinash kumar techrel
Free space Used in Contol Interval.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / nihar ranjan karan
The biggest disadvantage of a VSAM dataset I believe is
that it can be only be created on a DASD. So it obviously
means you cannot use any other media for storage and
retrieval of VSAM datasets.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / vinothkumar
DISADVANTAGES:
(i)the vsam file have FREE SPACE parameter with in the CI.
so,it will take large memory space.
(ii)it have CONTROL INFORMATION by itself. that's why it
will take more memory space.
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / philippe van de woestyne
Also the overhead (shareoption(4)) when sharing (I/O) the
same file from multiple environment, EG Cics + Batch
| Is This Answer Correct ? | 0 Yes | 2 No |
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 ?
How do you convert flat files to VSAM files ?
What is the catalog?
What is Control Interval, Control Area ?
Is CA(Control Area) is part of CI(Control Interval)
Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.
How to declare the EMP Name, EMP No., DOB in VSAM KSDS file? Please explain.....
explain the differences between vsam and non-vsam files
Explain the difference between lds and esds?
why do we use vsam file thn seqential files ?
Explain the catalog?
What are the types of VSAM datasets?
COBOL 
