A cost-effective and service-differentiated provisioning strategy is very desirable to service providers so that they can
offer users satisfactory services, while optimizing network resource allocation. Providing differentiated protection
services to connections for surviving link failure has been extensively studied in recent years. However, the
differentiated protection services for workflow-based applications, which consist of many interdependent tasks, have
scarcely been studied. This paper investigates the problem of providing differentiated services for workflow-based
applications in optical grid. In this paper, we develop three differentiated protection services provisioning strategies
which can provide security level guarantee and network-resource optimization for workflow-based applications. The
simulation demonstrates that these heuristic algorithms provide protection cost-effectively while satisfying the
applications' failure probability requirements.
Optical grid, the integrated computing environment based on optical network, is expected to be an efficient
infrastructure to support advanced data-intensive grid applications. In optical grid, the faults of both computational and
network resources are inevitable due to the large scale and high complexity of the system. With the optical network
based distributed computing systems extensive applied in the processing of data, the requirement of the application
failure probability have been an important indicator of the quality of application and an important aspect the operators
consider. This paper will present a task-based analysis method of the application failure probability in optical grid. Then
the failure probability of the entire application can be quantified, and the performance of reducing application failure
probability in different backup strategies can be compared, so that the different requirements of different clients can be
satisfied according to the application failure probability respectively. In optical grid, when the application based DAG
(directed acyclic graph) is executed in different backup strategies, the application failure probability and the application
complete time is different. This paper will propose new multi-objective differentiated services algorithm (MDSA). New
application scheduling algorithm can guarantee the requirement of the failure probability and improve the network
resource utilization, realize a compromise between the network operator and the application submission. Then
differentiated services can be achieved in optical grid.
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