Secrets of OpenVMS^® File I/O

Contents (summary)

• Chapter 1 MEASURING HOW I/O BOUND YOU ARE
• Chapter 2 REDUCING FILE I/O BOTTLENECKS
• Chapter 3 VMS BACKUP I/O CONSIDERATIONS
• Appendix A VOCABULARY - MEASURING HOW I/O BOUND YOU ARE
• Appendix B VOCABULARY - REDUCING FILE I/O BOTTLENECKS
• Appendix C VOCABULARY - VMS BACKUP I/O CONSIDERATIONS
• Index
• Examples
• Tables

Contents

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  Chapter 1 MEASURING HOW I/O BOUND YOU ARE
  • 1.1 What Can You Do about an I/O Bound System?
  • 1.2 Determining Which Files are Hot
    • 1.2.1 Other Methods of Determining Hot Files
    • 1.2.2 File Access and Deaccess
    • 1.2.3 Installing SETWATCH.EXE with Privileges

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  Chapter 2 REDUCING FILE I/O BOTTLENECKS
  • 2.1 What Can You do about an I/O Bound System?
  • 2.2 Speeding Up I/O Operations
  • 2.3 Eliminating I/O Operations
  • 2.4 Host Based Data Caching
  • 2.5 RMS File CONVERSION
  • 2.6 RMS Buffering
    • 2.6.1 RMS Local Buffering
    • 2.6.2 RMS Global Buffering
    • 2.6.3 An RMS Global Buffering Example
    • 2.6.4 Monitoring RMS Cache Hits
    • 2.6.5 Statistics Option
    • 2.6.6 SYSGEN Parameter Changes
  • 2.7 Disk Defragmentation
  • 2.8 File Defragmentation
    • 2.8.1 Create a .FDL for the file
    • 2.8.2 Customize the .FDL file
    • 2.8.3 Converting and Renaming

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  Chapter 3 VMS BACKUP I/O CONSIDERATIONS
  • 3.1 Data-Block Layout
  • 3.2 The Effects of Block Size
  • 3.3 Sequence Number Usage
  • 3.4 Error Detection and Correction
    • 3.4.1 Cyclic Redundancy Check
    • 3.4.2 Redundancy Group Data
    • 3.4.3 Tape Devices with Hardware CRC and ECC
    • 3.4.4 Tape Devices with Minimal Error Correction

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  Appendix A VOCABULARY - MEASURING HOW I/O BOUND YOU ARE

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  Appendix B VOCABULARY - REDUCING FILE I/O BOTTLENECKS

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  Appendix C VOCABULARY - VMS BACKUP I/O CONSIDERATIONS

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  Master Index

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  Examples
  • 1-1 MONITOR DISK Utility
  • 1-2 Locating Hot Files
  • 2-1 MONITOR RMS Utility

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  Tables
  • 2-1 Eliminating File I/O Operations
  • 2-2 SYSGEN Parameters Changes for RMS Global Buffering
  • 2-3 SYSGEN Parameters Changes for RMS Global or Local Buffering