the experiment results of the cloud platforms
are respectively explained to reflect the effect of the enhancement solution
in each phase. First of all, the CloudBook employs a parallel solution
called Group-of-Pictures (GoP) framework that separates all bitmap
images in an E-book into multiple groups and converts the groups of
the bitmap images on Hadoop platform in parallel. In the experiments,
we compare the CloudBook with other methods, including servers
with sequential process (sequential server) and conventional Hadoop
platform, in the performance enhancement. Fig. 13 shows the performance
enhancement achieved by the proposed CloudBook solution, in
terms of the total execution time. In Fig. 13, the experimental tasks are
set from 2500 to 100,000. As Fig. 13 shows, the CloudBook obtains the
significant improvement when the number of tasks are increased