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What is the use of VSAM files? How to read this ?
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Answer Posted / y@$w@nth
VSAM stands for Virtual Storage Access Method.it organizes
the records in a file in different formats for faster
accessing. various vsam datasets(files) structures are
KSDS(Key Sequential Dataset)
ESDS(Entry Sequenced Dataset)
RRDS(Relative Record Dataset)
we can read the Vsam Files
sequentially,randomly,dynamically(sequential,random) based
on the organization it refers.the following are the access
methods that we can perform on vsam datasets(files)
KSDS(sequential,random,dynamic)
ESDS(sequential,random)
RRDS(sequential,random)
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Why is it required to have a keyed directed retrieval?
what do you mean by the cobol record key clause in vsam?
in a cobol select statement for a ksds can you tell me what are the 3 possibilities for access?
what does a file status of 02 on a vsam signifies?
What is the main function of key-sequenced data set?
Explain the device independent method to indicate where a record is stored?
Explain the biggest disadvantage of using a vsam dataset?
What are the different dataset organizations used in vsam?
What is a lds (linear data set)?
What is the purpose of relative record data set used in vsam?
what how do you initialize a vsam file before any operation? A vsam with alternate index?
Define gdg?
is it necessary that all versions of the gdg have to be of the same record length?
Explain the process in which flat files are converted into vsam files?
On which dataset you can have alt index?
