Crash Recovery

• What happens on a client or server crash?
  • Per-client list on each server
    • Booting, alive and dead state
    • Version info on each RPC
  • Object version information
  • Reopen protocol
    • What to do when you get back stale info?
  • Idempotent recovery protocol
    • What if crash in the middle of recovery Try again!
  • Crash detection
    • boot-stamped RPC
    • pingers

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