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.

On which datasets You can have ALT INDEX?

2 Answers  

What is the use of KSDS,LDS,ESDS,RRDS??what is VRRDS?? How are all these useful in realtime scenario??Plz helpme out...Its a recent question in IGATE..

0 Answers   iGate,

what is meant by s0c-07 system abend codes?

0 Answers   IBM,

What are the steps involved in access method services?

0 Answers  

what is the difference b/w sequential and ESDS

6 Answers   EDS, IBM, Maples,

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?

3 Answers  

how yo view the vsam file?

5 Answers   DSRC, TCS,

How many Alternate Indexes you can have on a dataset?

2 Answers   AB Inc,

How do I declare the KSDS vsam so that I can store a reocrd with variable length?.

2 Answers  

What does a file status of 02 on a VSAM indicate?

1 Answers   IBM,

Describe the uses of ams?

0 Answers  

What is Base Cluster ?

1 Answers