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Abstract
The past years have witnessed the significant development of the Internet. Numerous emerging network architectures and protocols have triggered the demand for traffic generators which stand in stark contrast to previous schemes. Namely, fixed test content is inefficient in the presence of such a dynamic and realistic demand. Moreover, the requirement of high-performance has raised the stakes on developing a new concurrent system. In this paper, we present a hierarchical parallel design for a Web traffic generator on a TILERAGX36 processor, called TGMP. We discuss the challenges in developing its hierarchical architectural design, and elaborate on its implementation details. Specifically, in order to generate a realistic network workload over a long and large time scale, we propose a user-control scheme based on cubic spline interpolation. To better improve the scalability of the system and satisfy the required flow rate, we adopt techniques, including optimization of parameters under the Linux kernel, event-driven concurrency, and parallel architectures of a TILERAGX36 processor. The experimental results demonstrate that TGMP is able to create real traffic and simulate 50,000 users accessing the Web server simultaneously.
Highlights
A traffic generator is the major tool to provide network background traffic to evaluate and verify the performance, protocol, and security of the experimental network
Some commonly used tools have been made for a Web traffic generator, of which the two most typical types are the special equipment based on hardware and the software tool running on general hardware
We develop a high-volume parallel design for a Web traffic generator on Many-Core processors, called TGMP
Summary
A traffic generator is the major tool to provide network background traffic to evaluate and verify the performance, protocol, and security of the experimental network. With the continuous in-depth application of the emerging network architecture, such as SDN (Software Defined Network), and CCN (Content-Centric Networking), there has been an urgent and ever-increasing demand for a traffic generator with high-performance, flexibility, low cost and reality Such a tool is not available, and is usually of much smaller scale than needed. In this paper, aiming to design a Web traffic generator with the characteristics of verifying the future network architectures, we propose a flexible framework to support arbitrary models. In order to generate a realistic network workload over a large time scale, we combine the method of user behavior with the user-control method by cubic spline interpolation. The software architecture of a Web traffic generation system is proposed by using the hierarchical design methodology including the control layer, virtual user layer and traffic generation layer, to provide high scalability.
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