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Meaning of VIRTUAL STORAGE ACCESS METHOD

 
Computing Dictionary
 
 Definition: 

(VSAM) An ibm disk file storage scheme first used in s/370 and virtual storage. VSAM comprises three access methods: keyed sequenced data set (KSDS), relative record data set (RRDS), and entry sequenced data set (ESDS).

Both ims/db and db2 are implemented on top of VSAM and use its underlying data structures.

 

 

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