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Data Map Properties - ESDS Access Method

View or edit properties for a VSAM entry-sequenced data set (ESDS) data map.

File Name: The fully-qualified data set name of the VSAM entry-sequenced data set (ESDS).
Number of Data Buffers: The number of I/O buffers for data control intervals that PowerExchange requests VSAM to allocate.

Default is 2.
CI ACCESS: Accesses the entire contents of a control interval rather than individual data records when reading VSAM data sets. This option improves read performance.

Clear this option to access the contents of individual data records when reading VSAM data sets.

You cannot use the
CI ACCESS
option if the data set is compressed.
Prefix record with XRBA value: Returns the extended relative byte address (XRBA) value for all records read from the VSAM data set. The XRBA value is returned in the first eight bytes of each record.

You must has include a 8-byte binary field at the beginning of the record to contain the XRBA value. If you select this option and you do not include an 8-byte binary field at the beginning of the record, the data maps incorrectly when you get it.
File List Processing: Uses file list processing for the data map.
Data Codepage: The code page that describes the character set for the character data in the database. For the
Default
code page, PowerExchange uses the default code page for the operating system.

Default is
Default
.
Skip First n Records from File: The number of header records in the data file to skip. For example, if the data file contains one or more header records that do not contain data, enter the number of header records to skip.

Valid values are from 0 through 2147483647. Default is 0.