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Space announcement We are no longer updating this space, and you cannot comment on this space. The IMAGE COPY PLUS component is now documented in BMC AMI Backup and Recovery for IMS.

DBACC keyword

Use the DBACC keyword to identify the access method to use when reading the input database.

Uses

Optional in global and database-specific options modules. Optional on the following control statements:

  • GLBL
  • GROUP
  • IC and AIC
  • OIC and AOIC

Related keywords

When you specify DBACC(3), you must also specify the following keywords in a control statement or options module:

  • MINCYL

Syntax

DBACC(value)

Values

Specify one of the following values:

  • 1—Use native (OSAM/VSAM) access methods. Use the DBBUF keyword to control the number of buffers. VSAM KSDS and ESDS overflow data sets are processed using VSAM control interval (CI) processing. DBBUF has no effect on buffer allocation for these types of data sets.
  • 2—Use EXCP-level access methods. The utility allocates the number of buffers equal to two cylinders or control areas of DASD space. These buffers reside above the 16 MB line.

  • 3—Use the start I/O access method. The utility allocates the number of buffers equal to two cylinders or control areas of DASD space. These buffers reside above the 16 MB line in fixed storage.

    Warning

    Important

    The start I/O access method has replaced the DBUSS for fast I/O services under DBACC(3). The utility still uses other services of the DBUSS.

    If the size of the database data set is smaller than the number of cylinders identified using the MINCYL keyword, the utility switches from DBACC(3) to DBACC(2) (EXCP processing) for OSAM data sets and to DBACC(1) (VSAM processing) for ESDS.

Default

DBACC(3)


Related topic

ICPSYSIN-keywords


 

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IMAGE COPY PLUS 5.1