Dell ECS: High Availability Design

• 1
  Overview
• 2
  Revisions
• 3
  Terminology
• 4
  We value your feedback

• 1
  Introduction
• 2
  Chunks
• 3
  ECS metadata
• 4
  Failure domains
• 5
  Advanced data-protection methods
• 6
  Erasure coding protection levels
• 7
  Checksums
• 8
  Writing objects
• 9
  Reading objects

• 1
  Introduction
• 2
  Disk failure
• 3
  ECS node failure

• 1
  Overview
• 2
  Chunk manager tables
• 3
  XOR encoding
• 4
  Replicate to all sites
• 5
  Write data flow in geo-replicated environment
• 6
  Read data flow in geo-replicated environment
• 7
  Update data flow in geo-replicated environment

• 1
  Overview
• 2
  Temporary site outage (TSO)
• 3
  Permanent site outage (PSO)

• 1
  Conclusion

• 1
  Appendix: Technical support and resources