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W-setT i and R-setT i received the scheduler
No
T j in Execution
Ye s
e scheduler executes Ti i
Ye s
L(T i ) > L(T j )
No
No
L(T i ) = L(T j )
Ye s
(W-set ?? T j
R-set ?? T i ≠ φ) &
(W-set ?? T j
W-set ?? T i ≠ φ)
Block Ti i
No
Ye s
e scheduler executes
them concurrently
e scheduler selects and
executes those transactions
End
Figure 7.2
The flow chart for the enhanced secure multiversion concurrency control model.
7.4.1 Workload Model
The workload defines the transactions according to their classification
levels and their data. Table  7.1 presents the main parameters of the
workload.
7.4.2 System Model
The machine that is used in the implementation consists of CPU
speed of 2.2 GHz, physical RAM size of 3 GB, and hard-disk size
of 320 GB. The software used in the implementation is a Microsoft
SQL server 2008 R2 and the experiments' measurements were
 
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