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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 ? | 15 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 |
how do you create an alternate index ?
in what type of vsam datasets can an alternate index be defined??
What is the main function of key sequenced data set in vsam?
How do you define an altindx?
How do I declare the KSDS vsam so that I can store a reocrd with variable length?.
what is the RRN for the first record in RRDS?
what do you mean by a upgrade set in vsam?
What is a VSAM split?
What is a cluster?
Do primary key values have to be unique? Do alternate key values have to be unique?
Explain the device independent method to indicate where a record is stored?
What is the difference between shroptions(2 3) and shroptions (4 3) in the Def CLUSTER ??
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