Dependability

Contents 1 fault prevention 2 fault forecasting 3 fault removal 4 fault tolerance 4.1 fault tolerance for distributed applications

fault prevention

good programming, platform, and forethought, perhaps?

fault forecasting

vigilance....

fault removal

perhaps once a fault is know about.. then having quality systems in place to systematically determine the root cause of the fault... and then systematically change one variable at a time until a fix is found

fault tolerance

fault tolerance for distributed applications

en.wikipedia.org/wiki/Database_transactions transactions]//en.wikipedia.org/wiki/Database_transactions transactions]

• en.wikipedia.org/wiki/Database_transactions transactions]//en.wikipedia.org/wiki/ACID ACID] properties:
  • • atomicity
    • consistency
    • isolation
    • durability

en.wikipedia.org/wiki/Commitment_ordering]//en.wikipedia.org/wiki/Commitment_ordering]

• • centralized/distributed

en.wikipedia.org/wiki/Database_transactions transactions]//en.wikipedia.org/wiki/Checkpointing checkpointing] en.wikipedia.org/wiki/Database_transactions transactions]//en.wikipedia.org/wiki/Replication_%28computer_science%29 replication] <- most difficult