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).

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.

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.

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.

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.

Answer / ram

online environment cannot access ps(batch)
but vsam can

Answer / vignesh

A)
1.ISPF panel or a standard JCL is used for creation of a PS
files.
2.AMS program is used to create the VSAM files

B)
1.Information about PS files is stroed as dataset labels in
the VTOC(VOLUME TABLE OF CONTENTS).
2.VSAM is stored in CATALOG.

how can you load a vsam data set with records ?

0 Answers   IBM,

How many Alternate Indexes you can have on a dataset?

2 Answers   AB Inc,

Can AMS commands be run from the TSO prompt ?

1 Answers   IBM,

Explain the meaning and syntax for the START command. ?

4 Answers   IBM,

What do you mean by dirty read ?

5 Answers  

What are the different versions of gdg named?

0 Answers  

should a AIX should be a unique value?

1 Answers  

If fspc(100 100) is specified does it mean that both the control interval and control area will be left empty because 100 % of both ci and ca are specified to be empty?

0 Answers  

What is the index set?

1 Answers  

I have three fields in a Variable VSAM file X(2) Y(10) occurs X times Z(02) Say for the first record X=2 then the length of the file is 2+(10*3)+2=34 second record, x=4 then 4+(10*4)+2=46 If any time if the field x is updated then the total length changes. Is it feasible? Is it

2 Answers  

what is the concept of IMPORT in vsam??

2 Answers  

What is SHAREOPTS ?

2 Answers