OSD developer documentation

• Asynchronous Recovery
• Erasure Coded Placement Groups
  • Table of content
    • • Introduction
      • Erasure code library
    • Jerasure plugin
    • ECBackend Implementation Strategy
      • • PGTemp and Crush
        • Object Classes
        • Crush
    • • MAIN OPERATION OVERVIEW
        • READ-MODIFY-WRITE
        • ExtentCache
• last_epoch_started
• • Overview
  • MOSDPGOp/MOSDPGSubOp
  • Peering Messages
• • Concepts
• OSD Throttles
  • op_queue_throttle
• Partial Object Recovery
• PG
• PG Removal
• Recovery Reservation
  • Things to Note
• Scrub internals and diagnostics
  • State variables
• Snaps
  • Ondisk Structures
  • Recovery
  • Split
• • readable_until
  • PG “laggy” state
  • Dead OSDs
• • Overview
  • Notify Lifecycle