What is the difference between PS file and VSAM file?
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Answer / ram
In physical sequential file records are stored in terms of
blocks,where as in VSAM files records are stored in
ControlInterval(C.I).
| Is This Answer Correct ? | 51 Yes | 3 No |
Answer / manjula
PS files can be created on tapes while the VSAM files
cannot. Also, VSAM files can have ALTINDX(alternate index)
while no such facility exists for PS files.
| Is This Answer Correct ? | 23 Yes | 3 No |
Answer / tanushree
Storage capacity of VSAM file is more than that of NON-Vsam file.
in VSAM if tale 1 trk => 1+1*122=123 extent allocation.
where as in NON-VSAM, for 1 trk => 1+1*15=16 extent allocation.
| Is This Answer Correct ? | 14 Yes | 0 No |
Answer / avinash kumar techrel
ps file is used for writing a program and storing data.but
vsam used only for storing data.ps file accessed
sequentially.but vsam accessed sequentially,randomlyand
dynamically.
| Is This Answer Correct ? | 10 Yes | 1 No |
Answer / vivek
VSAM files are used when we want to store data based on
some key fields(Eg: KSDS)
access method is indexed.
NON VSAM files like PS are used when we want to store data
which is not unique and also the access is sequential.
| Is This Answer Correct ? | 7 Yes | 2 No |
Why is master catalog used in vsam?
is it necessary that all versions of the gdg have to be of the same record length?
what is the use of the file status clause in the select statement in vsam?
What is a sequence set?
Differentiate between control interval (ci) and control area (ca)?
what is meant by s0c-07 system abend codes?
How Vsam was evolved? What was the equivalent file for ESDS,KSDS and RRDS prior to evolution? What were their disadvantages of those file which leads to evolution of ESDS,KSDS and RRDS files ?
What is the purpose of the FILE STATUS clause in the SELECT statement?
Describe the uses of ams?
what does a file status of 02 on a vsam signifies?
How can you create a VSAM dataset? Can you write a JCL for it?
what is vsam catalog ?
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