Transactional Example

• T = start_transaction()
  • write start(T)
• do work ....
  • write updates to the log
• call end_transaction(T)
  • write commit(T) to the log
• Periodically clean log and update the DB
• Can we apply the notions of defered commit and rollback more generally to system state? System calls? File updates?
  • What about performance?

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