Mandatory:

• "Real" RPC Transport
  • no length limit (at least segment size)
  • multiple implementations (udp, tcp, wicked fast aravindRPC)
• Full Unit Tests
• Debug Logging/Tracing
• Performance Measurement/Tracing
• Consistency checking
  • Log checksums
  • Hash Table
  • Indexes

Optional:

• Multiple:
  • Backups
  • Masters
  • Index Hosts
• Cluster Coordinator
• 2-phase recovery
• Fast backup recovery