Speedup with respect to the number
of servers in Star Student Project Landmarks. x-axis: the
number of servers; y-axis: speedup. Lines: Star Student Project .
Direct distribution Star Student Project . Frequency
distribution Star Student Project . Lossless distribution Star
Student Project . Lossy distribution Star Student Project .
Lossy distribution with log Star Student Project . Local
indexing Star Student Project . The performance is based on
concurrent queries on average, with different settings of Star
Student Project servers. .