ترجمه تخصصی مقاله مربوط به رشته نرم افزار کامپیوتر

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سلامترجمه تخصصی مقاله مربوط به رشته نرم افزار کامپیوتر

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مدت زمان انجام و تحویل: ۱۳۹۵/۱۱/۰۴

عنوان:

Distributed Online En-Route Caching

Content caching at intermediate nodes is an effective way to optimize the operations of Computer networks, so that future
requests can be served without going back to the origin of the content. Several caching techniques have been proposed in literature,
including techniques that require major changes to the Internet architecture. In this work, we present a low complexity, distributed, and
online caching algorithm based on content popularity. Our algorithm performs en-route caching using a simple cost-reward
comparison. Therefore, it can be integrated with the current TCP/IP model. We use the concept of competitive ratio to measure the
performance of any online caching algorithm, in terms of traffic savings, with respect to the performance of the optimal offline algorithm
that has a complete knowledge of the future. We show that under our settings, no online algorithm can achieve a better competitive
ratio than Vðlog nÞ, where n is the number of nodes in the network. Furthermore, we show that under realistic scenarios, our algorithm
has an asymptotically optimal competitive ratio in terms of the number of nodes in the network. We also study several extensions to the
basic algorithm and show their effectiveness through extensive simulations.
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Farhad-1279

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