What is the use of VSAM files? How to read this ?
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Answer Posted / dinesh
VSAM (or) VIRTUAL STORAGE ACCESS METHOD. it is faster access
to data, when comparing other access methods by the way of
Data sets ORGANIZATION. we can able to insert a records in
good way.records are physical removed while we deleting the
records and we can get the free space.
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What is the purpose of idcams?
On which dataset you can have alt index?
Under idcams, multiple functions can be executed, each of which returns a condition code. What will be the condition code returned to the operating system?
What is the main function of key sequenced data set in vsam?
Define gdg?
How to get the last record in vsam file in cluster? And how can u get the ksds file records into cobol program?
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 do you mean by recovery and speed parameters in define cluster command?
explain how can you initialize a vsam file before any operation?
What is the place for VSAM KSDS?
Explain the index set?
In a KSDS file, key is missing for one record. How to insert the key for that particular record from back up file. Is there any sorting needed for the back up file before the key insertion?
what are the additional information you should give in the dd statement while defining the next generation of a gdg?
How is record management performed in vsam?
What is the use of lds (linear data set)?
