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Unformatted text preview: four blocks on four disks stored on the fifth disk. How many blocks are accessed in order to perform the following? a. A write of one block of data b. A write of seven continuous blocks of data Problem 3: Consider a distributed system with two sites, A and B. Consider whether site A can distinguish among the following: a. B goes down. b. The link between A and B goes down. c. B is extremely overloaded and its response time is 100 times longer than normal. What implications does your answer have for recovery in distributed systems? Problem 4: Consider AFS, which is a stateful distributed file system. What actions need to be performed to recover from a server crash in order to preserve the consistency guaranteed by the system? Problem 5: Consider the centralized and the fully distributed approaches to deadlock detection. Compare the two algorithms in terms of message complexity....
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This note was uploaded on 02/27/2012 for the course CSE 421/521 taught by Professor Binar during the Fall '11 term at SUNY Buffalo.
- Fall '11
- Operating Systems