Discuss whether message passing or DSM is preferable for fault-tolerant applications.
What will be an ideal response?
Consider two processes executing at failure-independent computers. In a message passing system, if one
process has a bug that leads it to send spurious messages, the other may protect itself to a certain extent by
validating the messages it receives. If a process fails part-way through a multi-message operation, then
transactional techniques can be used to ensure that data are left in a consistent state.
Now consider that the processes share memory, whether it is physically shared memory or page-based
DSM. Then one of them may adversely affect the other if it fails, because now one process may update a shared
variable without the knowledge of the other. For example, it could incorrectly update shared variables due to
a bug. It could fail after starting but not completing an update to several variables.
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Fill in the blank(s) with the appropriate word(s).
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Answer the following statement true (T) or false (F)