Distribution systems servers Each of the servers is available at any instant wit

Question

Distribution systems servers Each of the servers is available at any instant with a probability of90% Ir the system is designed so that the system can be working if any one of the four servers is working, what is the overall system availability? What if the system is designed such that all 5 servers have to be available for the entire system to be server over an RPC, the the server being implemented in this keeps with the result of the request. xO ) to the server unti RPC failure semantics is What Explain how the client and server has to be 5. Bring the following seps of RPC imto the comect onder A.Server B.Client's O'S gives message to clien tub C.Remote OS gives D.Client stub unpacks calls server server stub alls client stulb in normal wy to elient E Stub message, calls local OFS G.Server's O'S sends message to cliens O H.Server does work, returns result to the stub J.Client's OS sends message to remote OS K.Server Stub packs it in message, calls local OS ORDER

Explanation / Answer

3.

The Probability of the server being up is 90% i.e. 0.9 which makes the probability of one server being down is 0.1 (1-0.9)
The probability of all 4 servers being down simultaneously is (0.1)4 = 0.0001
So the probability of at least one being available of the four is is 1-0.0001 =0.9999

In the second scenario, the probability of all five servers being available at the same time is (0.9)5 is 0.59049

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