68
2500
1800
ssl_session
ssl_bf
2000
1700
1500
ssl_session
1600
ssl_bf
1000
Throughput
1500
500
Average Request Latency (ms)
0
1400
15K
30K
45K
60K
15K
30K
45K
60K
File Size
File Size
(a) Latency
(b) Throughput
Fig. 4.9. Latency and Throughput Variation with File Size (N=32, k=20)
servers with low access rates, while a few clients show aggressive accesses to the Web
servers. So, we divided the clients into two group; busy clients and normal clients. The
busy clients generate frequent requests to the servers, while the normal clients access
the web resource less frequently. In our experiment, 10% of the requests are from busy
clients and 90% are from normal clients. The interval time of requests between the two
different scenarios are adjusted to have the same average interval (Expected value for
the Pareto distribution   =  k   (  - 1)
-1
).
In Figure 4.10, we compared four models, ssl with bf, mixed ssl with bf, ssl with session
and mixed ssl with session. ssl with bf and ssl with session are the same model used in
the previous experiments, and mixed ssl with bf and mixed ssl with session are the the
results with busy and normal clients. Figure 4.10 shows very interesting results. The la 
tency of mixed ssl with session slightly increases, while mixed ssl with bf shows reduced
latency up to 40% compared to the results with homogeneous customers.












  

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