Updated: 11 December 1998

Guide to OpenVMS File Applications

Appendix A
Appendix A	Edit/FDL Utility Optimization Algorithms
A.1	Allocation
A.2	Extension Size
A.3	Bucket Size
A.4	Global Buffers
A.5	Index Depth
Glossary
Glossary	Glossary
Index
Index
Examples
2-1	Creating a File Containing Collated Keys
4-1	Sample Edit/FDL Utility Session
4-2	Sample FDL File
4-3	Using FDL Routines in a Pascal Program
4-4	Using the FDL$CREATE Routine in a Fortran Program
4-5	Using the FDL$CREATE Routine from a COBOL Program
4-6	Tagging a File
4-7	Accessing a Tagged File
4-8	Using the CONVERT Routines in a Fortran Program
4-9	Using the CONVERT Routines in a COBOL Program
5-1	Using Logical Names for Remote File Access
5-2	Selecting the USEROPEN Option to Call a Routine
5-3	Using the Parse and Search Services
6-1	Rooted-Directory Syntax
7-1	Designing a Pause Between Attempts to Access a Record
9-1	Specifying Run-Time Attributes
9-2	Using the FDL$PARSE and FDL$RELEASE Routines
10-1	Using ANALYZE/RMS_FILE to Create a Check Report
10-2	Using ANALYZE/RMS_FILE to Create a Statistics Report
10-3	Examining a Sequential File
10-4	Examining a Relative File
10-5	Examining an Area Descriptor Path
10-6	Examining a Primary Record
10-7	Examining an Alternate Record
10-8	KEY and ANALYSIS_OF_KEY Sections in an FDL File
Figures
1-1	Files--11 On-Disk Structure Hierarchy
1-2	Single and Multiple File Extents
1-3	Tracks and Cylinders
1-4	DSI and FAT Structures in an XAR
1-5	Interrecord Gaps
1-6	Basic Layout of an ANSI Magnetic Tape Volume
1-7	Single File on a Single Volume
1-8	Single File on Multiple Tape Volumes
1-9	Multifile/Single-Volume Configuration
1-10	Multifile/Multivolume Configuration
1-11	Blocked Fixed-Length Records
1-12	Variable-Length Records
1-13	Using CONVERT to Create a Data File
1-14	Using CREATE/FDL to Create an Empty Data File
2-1	Sequential Access to a Sequential File
2-2	Sequentially Retrieving Records in a Relative File
2-3	Sequentially Storing Records in a Relative File
2-4	Random Access by Relative Record Number
2-5	Random Access by Record File Address
2-6	Comparison of Fixed- and Variable-Length Records
2-7	Writing a VFC Record to a File
2-8	Retrieving a VFC Record
2-9	Sequential File Organization
2-10	Relative File Organization
2-11	Variable-Length Records in Fixed-Length Cells
2-12	Single-Key Indexed File Organization
2-13	Multiple-Key Indexed File Organization
3-1	RMS Index Structure
3-2	Primary Index Structure
3-3	Finding the Record with Key 14
4-1	Line_Plot Graph
4-2	Surface_Plot Graph
4-3	Design Mnemonics
7-1	Shared File Access
7-2	RMS Buffers and the Application Program
7-3	Using Global Buffers for a Shared File
8-1	Using RFA Access to Establish Record Position
10-1	Tree Structure for Sequential Files
10-2	Record Layout and Content for SEQ.DAT
10-3	Tree Structure of Relative Files
10-4	Area Descriptor Path
10-5	Key Descriptor Path
10-6	Structure of Primary Records
10-7	Structure of Alternate Records
10-8	RMS Tuning Cycle
Tables
1-1	Record Access Methods
1-2	Record Formats
1-3	File Structure Options on OpenVMS Systems
1-4	Comparison of ODS-1, ODS-2, and ODS-5
1-5	Files--11 Control Files
1-6	Labels and Components Supported by OpenVMS Systems
2-1	Supported Record Access Modes and File Organizations
2-2	File Organization Characteristics
2-3	Sequential File Organization: Advantages and Disadvantages
2-4	Relative File Organization: Advantages and Disadvantages
2-5	Indexed File Organization: Advantages and Disadvantages
4-1	Summary of the Edit/FDL Utility Commands
4-2	Edit/FDL Utility Scripts
6-1	File Specification Defaults
6-2	Example of Applying Defaults
7-1	File Access Record Operations
7-2	File-Sharing Record Operations
7-3	Initial File Sharing and Subsequent File Access
7-4	Initial File Access and Subsequent File Sharing
7-5	Compatibility of Record-Locking Options
8-1	Record Operations and File Organizations
8-2	Search Key Types
8-3	Record Access Stream Context
10-1	ANALYZE/RMS_FILE Command Summary

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