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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.
Define System Modeling? Explain the processes that serve requirements of the view under consideration. Shows the behaviour of the processes and the assumptions on which t
Within the discussion board area, respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your fellow clas
How LRU technique is implemented The LRU policy is more difficult to execute but has been more attractive on the assumption that the least recently used page is a better candid
Determine the Shared mode of QTP - Best used in subsequent cases: - When there are numerous tests which correspond to interface, objects, or application - When test obj
What is Data Dictionary? Data dictionary is a storehouse of data giving information about data. It is a list of terms and their meaning for all data items and data files of a s
Q. For the program given below, calculate the values of software science measures like ? , N, V, E and λ . int. sort (int x[], int n) { int i, j, save, im1; /
What are the challenges in software? Copying with legacy systems. Heterogeneity challenge Delivery times challenge
INMAGIC Plus: INMAGIC Plus is a microcomputer- based software package designed to build, maintain and use textual databases including bibliographic databases. As a generalised
What is the difference between module coupling and module collection? Cohesion is the property of a one module and can be defined as glue that keeps the data elements within a
Explain the Length of identifiers Length of identifiers :- This is a measure of the average length of separate identifiers in a program. The longer the identifiers, the more
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