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T he Internet and the applications it enables have transformed data center architectures from a simple single-server model to a multitier model in which Web servers, application servers, databases, and storage servers work together to respond to each client's request. As a result, overall application performance has become more dependent on the efficiency(More)
Detailed measurements and analyses for the Linux-2.4 TCP stack on current adapters and processors are presented. We describe the impact of CPU scaling and memory bus loading on TCP performance. As CPU speeds outstrip I/O and memory speeds, many generally accepted notions of TCP performance begin to unravel. In-depth examinations and explanations of(More)
The ETA project at Intel Research and Development has developed a software prototype that uses one of the Intel® Xeon TM processors in a multi-processor server as a packet processing engine. The prototype is used as a vehicle for empirical measurement and analysis of a highly programmable packet processing engine that is closely tied to the server's core(More)
The boundary between the network edge and the front-end servers of the data center is blurring. Appliance vendors are flooding the market with new capabilities, while switch/router vendors scramble to add these services to their traditional transport services. The result of this competition is a set of ad-hoc technologies and capabilities to provide(More)
We introduced the concept of a cache demand function and identified the size and lifespan of an object as important components of any web caching strategy. Due to the dynamic nature of web accesses, the strategy must also be adaptive. A web-caching agent needs to acquire knowledge about the objects it encounters, and deduce an effective strategy(More)