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Formulating Cost-Effective Monitoring Strategies for
Service-based Systems
Abstract
Service-based systems (SBSs) that are built through dynamic composition of
component services must be monitored in orde r to guarantee the response time of the SBSs.
However, monitoring consumes resources and very often impacts the quality of the SBSs
being monitored. Hence, monitoring incurs resource cost and system cost, which need to be
considered in formulating monitoring strategies for SBSs. The critical path of a composite
SBS, which is of particular importance in cost-effective monitoring, is probabilistic in
volatile operating environments. It is important to estimate the criticalities of different
execution paths when deciding which parts of the SBS to monitor. Furthermore, cost-effective
monitoring also requires management of the trade-off between the benefit and
cost of monitoring. In this pape r, we propose CriMon, a novel approach to formulating
monitoring strategies for SBSs. CriMon first calculates the criticalities of the execution
paths of an SBS and then, based on those criticalities, generates locally or globally optimal
monitoring strategy conside ring both the benefit and cost of monitoring. In-lab
experimental results demonstrate that in volatile environments the response time of an SBS
can be managed cost-effectively through CriMon-based monitoring. The effectiveness and

2. efficiency of the two monitoring strategy formulation methods are evaluated and
compared.
Existing system:
Service-based systems (SBSs) that are built through dynamic composition of
component services must be monitored in orde r to guarantee the response time of the SBSs.
However, monitoring consumes resources and very often impacts the quality of the SBSs
being monitored. Hence, monitoring incurs resource cost and system cost, which need to be
considered in formulating monitoring strategies for SBSs. The critical path of a composite
SBS, which is of particular importance in cost-effective monitoring, is probabilistic in
volatile operating environments. It is important to estimate the criticalities of different
execution paths when deciding which parts of the SBS to monitor. Furthermore, cost-effective
monitoring also requires management of the trade-off between the benefit and
cost of monitoring.
Proposed system:
In this paper, we propose CriMon, a novel approach to formulating monitoring
strategies for SBSs. CriMon first calculates the criticalities of the execution paths of an SBS
and then, based on those criticalities, generates locally or globally optimal monitoring
strategy considering both the benefit and cost of monitoring. In-lab experimental results
demonstrate that in volatile environments the response time of an SBS can be managed
cost-effectively through CriMon-based monitoring. The effectiveness and efficiency of the
two monitoring strategy formulation methods are evaluated and compared.
SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)

3.  Hard Disk - 20 GB
 Key Board - Standard Windows Keyboard
 Mouse - Two or Three Button Mouse
 Monitor - SVGA
SOFTWARE CONFIGURATION:-
 Operating System : Windows XP
 Programming Language : JAVA
 Java Version : JDK 1.6 & above.