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what is the concept of AIX in vsam ????
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Answer / sagar kajale
aix is used to access records of vsam ksds in order other than ksds files primary key or we can say base key. the ds over which aix exists is called a base cluster.
aix are ksds and has their own data and index component.
advantages:
can be updated automatically.
reduces data redundancy.
can be defined for both ksds and esds.
can have duplicates.
Disadvantages:
complex update logic.
performance degradation.
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COBOL 
