Consider a pair of processes X and Y that use the communication service B from Exercise 2.14 to communicate with one another. Suppose that X is a client and Y a server and that an invocation consists of a request message from X to Y (that carries out the request) followed by a reply message from Y to X. Describe the classes of failure that may be exhibited by an invocation.
What will be an ideal response?
An invocation may suffer from the following failures:
• crash failures: X or Y may crash. Therefore an invocation may suffer from crash failures.
• omission failures: as SB suffers from omission failures the request or reply message may be lost.
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What will be an ideal response?
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