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QUESTION - Fault Tolerance
(a) Three computers together provide a replicated service. The manufacturers claim that each computer has a mean time between failure of five days; a failure typically takes four hours to fix. What is the availability of the replicated service?
(b) In the gossip architecture, why does a replica manager need to keep both a ‘replica' timestamp and a ‘value' timestamp?
(c) Explain the difference between linearizability and sequential consistency, and why the latter is more practical to implement, in general.
(d) Explain why allowing backups to process read operations leads to sequentially consistent rather than linearizable executions in a passive replication system.
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which paradigm tend to correspond with top down and bottom up design
1. Perform a requirements analysis for the Case Study. Express the results using the following artefacts: a. A use case diagram for the functional requirements of the entire
What are the various types of system testing? 1. Recovery testing - is intended to check the system's capability to recover from failures. 2. Security testing - verifies tha
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Find the length of the hypotenuse. With a short side of radical 3 and a long side with 3 radical 2 Simplify the radical if you can.
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