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.

What more info you should give in the DD statement while defining the next generation of a GDG?

1 Answers   IBM,

can i see how many records does a vsam file have without browsing or without using file-aid? and same for ps file?

3 Answers   Tech Mahindra,

What does the KEYRANGES parameter in Define Cluster commend do?

1 Answers  

what is the concept of AIX in vsam ????

1 Answers   HCL,

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  

how can you copy to a vsam cluster?

0 Answers   IBM,

What is an alternate index?

1 Answers  

What is a lds (linear data set)?

0 Answers  

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

1 Answers  

Create syntax for a VSAM file ?

2 Answers   Xansa,

How can you create a VSAM dataset? Can you write a JCL for it?

4 Answers   IBM, TCS,

what is the meaning of each of the values in shareopts(2 3)?

0 Answers   IBM,