Table 1: The comparison of bandwidth occupied by each of servers (unit: MB/s).

Total number  
of users
Single  server (bandwidth of FFServer)Server cluster
Backbone bandwidthCentral serverRegional server 1Regional server 2
Foreign usersBandwidthForeign usersLocal usersBandwidthForeign usersLocal usersBandwidth

105.732.2021.96052.22052.26
126.870.8000.42142.88084.10
147.981.5621.49062.90084.23
169.131.8810.77163.411105.12
1810.642.2010.89285.040104.51
2011.323.1942.940104.510104.49
222.6311.231167.88264.01
242.6622.031167.80184.66
263.4133.221167.881105.10
282.8822.261167.852126.88