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VSAM
Last modified: Thursday, June 06, 2002 

Short for Virtual Storage Access Method, a file management system used on IBM mainframes. VSAM speeds up access to data in files by using an inverted index (called a B+tree) of all records added to each file. Many legacy software systems use VSAM to implement database systems (called data sets).

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For internet.com pages about VSAM . Also check out the following links!

Related Links

VSAM Capabilities and Limitations
IBM page that describes some potential problems with using VSAM including file size limitations.

WebCrawler help page
This help page provides information on WebCrawler basic search tips and techniques, features, general help, and contacts.

related categories

Databases

File Management

related terms

file management system

journaled file system

legacy application

mainframe

MVS


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