A clustered system is less tightly coupled than a multiprocessor system

A clustered system is less tightly coupled than a

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the other hand could be a single physical entity comprising of multiple CPUs. A clustered system is less tightly coupled than a multiprocessor system. Clustered systems communicate using messages, while processors in a multiprocessor system could communicate using shared memory. For two machines to provide a highly available service, the state on the two machines should be replicated and should be consistently updated. When one of the machines fail, the other could then take-over the functionality of the failed machine
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4. (5 points) Distinguish between the client–server and peer-to-peer models of distributed systems. A client server is the widely known model, here the machine (client) connects the user and allows access to the information stored in the server. Peer-to-peer is different from a client server in that instead of the client and server being distinguished each “node” can be the client or server and it all depends on which is requesting or providing services. 5. (15 points) Give two reasons why caches are useful. What problems do they solve? What problems do they cause? If a cache can be made as large as the device for which it is caching (for instance, a cache as large as a disk), why not make it that large and eliminate the device? A cache is useful because it allows the transfer of data between two components (it temporarily transfers it to a faster storage) for example if a faster component needs information and find it stored in the cache it would not need to wait for the slower
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  • Fall '19
  • CPU cache, Web server, c. distributed systems

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