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IBM ILOG CPLEX Optimization Studio delivers advanced and complex optimization libraries that solve linear programming (LP) and related problems, e.g., mixed integer. Moreover, the optimization tool provides users with its Academic Research Edition, which is available for teaching and noncommercial research at no-charge. This paper describes the usage of CPLEX C++ API for solving linear problems and,...
Recently, distributed computing system have been gaining much attention due to a growing demand for various kinds of effective computations in both industry and academia. In this paper, we focus on Peer-to-Peer (P2P) computing systems, also called public-resource computing systems or global computing systems. P2P computing systems, contrary to grids, use personal computers and other relatively simple...
Various kinds of distributed systems gain much attention in recent years. One of the most significant example is the Peer-to-Peer (P2P) paradigm widely used in many applications including: file-sharing systems (e.g. BitTorrent), computing systems (e.g. SETI@home), communication systems (e.g. Skype) and many others. In this work we present our latest research related to the problem of P2P-based distributed...
Multicast realises the data delivering to a group of destinations simultaneously while using the minimum network resources. The first implementation of multicasting has been built using specialized multicast routers and is well known as IP Multicast. Such a network comprises some drawback including complex addressing and routing scheme, it requires the deployment of special routers that are rather...
Multicast has been being developed as a very promising technique to data delivery to a group of destinations simultaneously. Except of first implementation for multicasting in the Internet aka IP Multicast, for past few years some systems defined for end-hosts overlay network have been successfully designed and implemented. Additionally, overlay multicast defined for end-host based networks has been...
Nowadays, many Internet users make use of Peer-to-Peer (P2P) systems to download electronic content including music, movies, software, etc. Growing popularity in P2P based protocol implementations for file sharing purposes caused that the P2P traffic exceeds Web traffic and in accordance with to many statistics, P2P systems produce a more than 50% of the whole Internet traffic. Therefore, P2P systems...
Multilayered model of network describes recent computers networks compounded of different layers of resources where different topologies in each layer are possible. It raises many new questions and changes most of well understood optimization problems on a single layer network into far from trivial. In this paper we focus attention on flow allocation in a multilayer network and we investigate dimensioning...
In recent years peer-to-peer (P2P) systems gain much attention. Growing popularity in P2P based protocol implementations for file sharing purposes caused that the P2P traffic exceeds Web traffic, once of the dominant traffic on the Internet. In fact of that, the use of P2P systems introduce many new problems related to traffic engineering or network optimization. In accordance to our previous works...
A term virtual capacity layer concerns multilayered model of the network. That kind of models refer to networks compounded of different layers of resources where different topologies in each layer are possible. Virtual capacity (VC) layer describes a network topology which is situated directly above transport layer. This paper focuses on topology of VC layer and its influence on the dimensioning issue...
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