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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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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?
what is the meaning of dynamic processing in vsam?
what do you mean by idcams? Explain its purpose?
Explain the device independent method to indicate where a record is stored?
Explain the process in which flat files are converted into vsam files?
Explain what are the optional parameters to the input dataset while loading the empty cluster with the data records?
what parameter in the define aix option is used to determine the maximum number of duplicate keys allowable ?
what do you mean by the cobol record key clause in vsam?
What are the steps involved in access method services?
Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.
What are the advantages of vsam over isam?
is delete operation supported in an esds? Is rewrite operation possible in esds?
Describe the uses of ams?
what do you mean by a upgrade set in vsam?
Define dynamic processing?
