Programming Guide (IO part) version 1.02

Contents:

• 1. Introduction
  • 1.1. The purpose of this document.
  • 1.2. Notation used in this document
  • 1.3. Abbreviations and aliases
  • 1.4. About trademarks
  • 1.5. Change log
• 2. Storage Overview
  • 2.1. Job submission flow
  • 2.2. Overview of Fugaku Storage Configuration
    • 2.2.1. File system available in Fugaku
    • 2.2.2. About Layered Storage
    • 2.2.3. Layered Storage Decision Flow
  • 2.3. First-layer Storage
    • 2.3.1. About Node Temporary Area
    • 2.3.2. About Shared Temporary Area
    • 2.3.3. About Cache Area of Second-Layer Storage
  • 2.4. About Second-Layer Storage
• 3. Capacity Setting
  • 3.1. First-Layer Storage Capacity Settings
  • 3.2. Example of Capacity Setting
  • 3.3. LLIO stripe feature
• 4. Settings For Using The Cache
  • 4.1. What you can do with cache settings
  • 4.2. Configuring a Second-layer Storage Cache Region
  • 4.3. Cache in Compute Node
    • 4.3.1. cn-cache-size
    • 4.3.2. cn-cached-write-size
    • 4.3.3. cn-read-cache
  • 4.4. Automatic Readahead Function
  • 4.5. Asynchronous Close
  • 4.6. Unwritten File List
  • 4.7. LLIO Performance Information
• 5. Exclusion Control
  • 5.1. Exclusive Control Using a Directory
  • 5.2. Exclusive Control Using File Locking