Entry-sequenced data set

Template:Short description Template:No footnotes An entry-sequenced data set (ESDS) is a type of data set used by IBM's VSAM computer data storage system.Template:Rp Records are accessed based on their sequential order, that is, the order in which they were written to the file; which means that accessing a particular record involves searching all the records sequentially until it is located, or by using a relative physical address (Relative byte address, RBA), i.e. the number of bytes from the beginning of the file to start reading.Template:Rp

Keys may be used to access records in an ESDS by defining an alternate index.Template:Rp

See also

• Key Sequenced Data Set
• Linear Data Set
• Relative Record Data Set
• Random access

References

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