Release Overview
Version 6.0

Vision File System

Vision Version 5

ACUCOBOL-GT Version 6.0 introduces a new Vision file format called Vision Version 5 (Vision 5, for short).

Vision 5 supports several new capabilities:

• records up to 64 megabytes in size
• larger block sizes
• larger pre-allocate and extension factors
• the ability to recover deleted records

Vision 5 is a superset of Vision 4. Like Vision 4, data and index information are segregated into separate physical file segments. All rules that apply to Vision 4 segment file naming also apply to Vision 5. For complete information, see section 6.1.3, "Indexed Files--Vision" in Book 1, ACUCOBOL-GT User's Guide.

In general, you can specify the Vision 5 format anywhere it is possible to specify a Vision file format. This includes:

• V_VERSION configuration variable
• filename_VERSION configuration variable
• "vutil -rebuild" command
• "vutil -gen" command
• "vutil -convert" command
• "vio -i" command

By default, ACUCOBOL-GT Version 6.0 creates Vision 5 files. To change the default, set the V_VERSION configuration variable. To specify Vision 5 (or any Vision version) for a particular file, use the filename_VERSION configuration variable. These configuration variables are described in Appendix H, "Configuration File Entries," of Book 4, ACUCOBOL-GT Appendices.

Vision 5 files cannot be read with any version of ACUCOBOL-GT prior to Version 6.0.

Vision file formats 2, 3, and 4 are still available and are fully supported. Existing Vision files retain their current format; they are not automatically converted. Vision Versions 3 and 4 are described in section 6.1.3, "Indexed Files--Vision," of Book 1, ACUCOBOL-GT User's Guide.

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Note: A notable exception is the AcuAccess file (used with AcuConnect, AcuODBC Server, and AcuServer), which is automatically converted to Version 5 when the file is opened for any reason. See the sections on AcuConnect, AcuODBC and AcuODBC Server, or AcuServer, for additional information.

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The Vision file utility, vutil, has been updated to support all of the unique features of Vision 5.

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