why do we use vsam file thn seqential files ?
Answers were Sorted based on User's Feedback
Answer / vijay
1)Record Insertion inbetween the existing recored is
poosible.
Where as in PS file we can add only at the end
2) we read record in any order
were as in PS it is possible to read from 1st , 2nd ,
3rd... like that
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / rajesh
ps files are stored in tape but esds cannot be stored in tape
and ps file cannot becreated alternate index but esds can be created
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / pramod reddy
ps files can created on tape.but not esds files.
alternate index can be created in esds.but not in ps.
records inserted in seq nd random.but in ps only seq.
| Is This Answer Correct ? | 1 Yes | 0 No |
On which datasets You can have ALT INDEX?
Explain what are the optional parameters to the input dataset while loading the empty cluster with the data records?
What do you mean by dirty read ?
What is a sequence set?
By looking into the Jcl can we identify the dataset is VSAM?
5 Answers Cognizant, Keane India Ltd,
what do you mean by define model parameter?
What is SHAREOPTS ?
Explain the purpose of the file status clause in the select statement?
what do you mean by a vsam split?
what are the idcams commands that can be used for vsam and explain each of them.
what is difference between repro and export? if any one know this plz tell me
what do you mean by a upgrade set in vsam?