Consistent timestamping for transactions in distributed systems

摘要: Tagging data in a database with timestamps that indicate when was entered can be very useful It permits user to query the as of some historical time Further it see transaction consistent re cent version without having this interfere ongoing updates This support requires timestamp ordering represent valid serialization transactions Achieving distributed sys tem is potentially troublesome paper suggests two phase commit protocol messages used establish and distribute correct all cohorts Re nements permit concept deal heterogenous systems where not perform timestamping Early release read locks supported via bounding range which permitted