Development and Evaluation of a Virtual PC Type Thin Client System - Data Management in Cloud, Grid and P2P Systems - page 120

Tabl e 3. Items for Performance Evaluation
# Evaluating time Details
1 Logon OS boot time [sec]
2 Application boot Boot time of Excel 2007, Word 2007, PowerPoint 2007, and PDF [sec]
3 Operation response Scroll time of Excel 2007, Word 2007, PowerPoint 2007, and PDF [sec]
4 Browser indication Indication time of Internet Explorer 8 [sec]
Determination of Standard Load Value. In documents [15][16][17], the
method for managing resources in the virtualization technology of the desktop
is discussed. Particularly, it is stated in these documents [15][16] that the CPU
utilization in one day is associated with each other day. We confirmed that the
current disk queue length, which is an index of the performance of the disk I/O,
repeats itself periodically by using a correlation analysis like in the documents
[15][16].
Therefore, we paid our attention to more detailed data (every ten minutes)
for one day. We show detailed data for one day in figure 8. The cross axis shows
the time. The vertical axis shows the mean of the current disk queue length of
20 users who used the CB system.
We understand that a singular point is in the neighborhood of 9:00, 13:00,
and 19:00 from figure 8. Thus, we defined 30 minutes before and after a singular
point as the peak load time and the others as a normal load time. We calculated
the peak load value as the maximum peak load time and the normal load value
for the mean as the normal load time. We calculated the highest value of each
load value for the standard value of the peak and normal load as a representative.
As a result, the peak load level became 2.43 from 8:30 to 9:30, and the normal
load value became 0.28 from 9:30 to 12:30.
Fig. 8. Transition of Load for One Day