5. File distribution (20 pt.) Consider distributing a file of F = 15 Gbits to N
ID: 3887134 • Letter: 5
Question
5. File distribution (20 pt.)
Consider distributing a file of F = 15 Gbits to N peers. The server has an upload rate of us = 30 Mbps, and each peer has a download rate of di = 2 Mbps and an upload rate of u. For N = 10, 100, and 1,000 and u = 300 Kbps, 700 Kbps, and 2 Mbps, prepare a chart giving the minimum distribution time for each of the combinations of N and u for both client-server distribution and P2P distribution
Solution:
a. Document Assumptions/Formulas/Variables used/etc (4 points):
b. Client Server (8 pt.) N
10
100
1000
u
300 Kbps
?
?
?
700 Kbps
?
?
?
2 Mbps
?
?
?
b. Client Server (8 pt.) N
10
100
1000
u
300 Kbps
?
?
?
700 Kbps
?
?
?
2 Mbps
?
?
?
Explanation / Answer
Answer:
File size = 15 Gb
b. Client Server (8 pt.) N
10
100
1000
u
300 Kbps
400 Kbps
500 Kbps
600 Kbps
700 Kbps
1 Mbps
1.4 Mbps
1.8 Mbps
2 Mbps
10 Mbps
20 Mbps
30 Mbps
b. Client Server (8 pt.) N
10
100
1000
u
300 Kbps
400 Kbps
500 Kbps
600 Kbps
700 Kbps
1 Mbps
1.4 Mbps
1.8 Mbps
2 Mbps
10 Mbps
20 Mbps
30 Mbps
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