OSD developer documentation

Contents

• Backfill Reservation
• Erasure Coded Placement Groups
  • Glossary
  • Table of content
    • Developer notes
      • Introduction
      • Reading and writing encoded chunks from and to OSDs
      • Erasure code library
      • Notes
    • Jerasure plugin
      • Introduction
    • High level design document
      • Motivation
      • Client Writes
      • Peering and PG Logs
      • PGTemp
      • Client Reads
      • Distinguished acting set positions
      • Object Classes
      • Scrub
      • Crush
      • Recovery
      • Backfill
• last_epoch_started
• Map and PG Message handling
  • Overview
  • MOSDMap
  • MOSDPGOp/MOSDPGSubOp
  • CEPH_MSG_OSD_OP processing
  • Peering Messages
• OSD
  • Concepts
  • Overview
• OSD Throttles
  • WBThrottle
  • op_queue_throttle
  • journal usage throttle
• PG
  • Concepts
  • Peering Details and Gotchas
• PG Removal
• Recovery Reservation
  • Things to Note
  • See Also
• Scrubbing Behavior Table
  • State variables
• Snaps
  • Overview
  • Ondisk Structures
  • Snap Removal
  • Recovery
  • SnapMapper
  • Split
• Watch Notify
  • Overview
  • Watch Lifecycle
  • Notify Lifecycle
• Writeback Throttle