Development and Evaluation of a Virtual PC Type Thin Client System - Data Management in Cloud, Grid and P2P Systems - page 113

2.3 Virtual PC System
The virtual PC system is a method for operating multiple virtual machines on
one physical server by introducing a hypervisor and for operating an OS and
desktop environment in each virtual machine. The multiple OSs operate on a
server with the virtual PC system, whereas only one OS per server operates with
the TS system. One virtual desktop environment operates for each individual OS.
Thus, making the environment to satisfy the needs of a user is possible because
we can install applications as well as CB systems individually. In addition, as
well as with the TS system, we can control data intensively.
3 Summary of Our Developed Virtual PC System
We built a virtual desktop environment for 1,200 users and 5,100 users in two
data centers. We plan to build a virtual desktop environment for 30,000 users in
total by constructing three data centers, each for 10,000 users, in the future.
We show some configurations of the system that we built in figure 2. As is
shown, the virtual desktop copes with hardware obstacles by assuming a high
availability (HA) configuration of 15:1. In addition, we made redundant the
authentication server, virtual desktop deploy server, virtual desktop login server,
and the scan definition server by using Active-Active configurations in order
to deal with load dispersion and obstacles. We made the file server redundant
by using N+1 configurations to save it for obstacle measures. We made some
storage management servers in accordance with the number required to manage
the system.
In addition, we show the function of each server shown in figure 2 in table
1. Furthermore, we show the procedure detailed in table 2 for when a user logs
into their own virtual desktop in figure 2.
4 Operative Problem and Solution to Large-Scale Virtual
PC System
When we manage a large-scale virtual PC system, the following problems become
clear.
- How can we effectively deploy a virtual desktop to a large number of users?
- How can we avoid obstacles and load balancing when security measures are
used?
4.1 Deploy Method Proposal
The virtual desktop delivery server delivers individual virtual desktops on a hy-
pervisor. This process is carried out by manual labor while referring to necessary
information, which is given by a manager. Specifically, a manager must set var-
ious pieces of information such as the fixed IP address or the license key, which