Power consumption is a dominant and still growing cost factor in data centers. In time periods with low load, the energy can be reduced by powering down unused servers. We resort to model introduced Lin, Wierman, Andrew Thereska [23, 24] that considers centers identical machines, generalize it heterogeneous d different server types. The operating of depends on its load modeled an increasing, co...

Over the past few years, the authors benchmarked 22 data center buildings. From this effort, we have determined that data centers can be over 40 times as energy intensive as conventional office buildings. Studying the more efficient of these facilities enabled us to compile a set of “best-practice” technologies for energy efficiency. These best practices include: improved air management, emphas...

Large data centers are currently the mainstream infrastructures for big processing. As one of most fundamental tasks in these environments, efficient execution distributed operators (e.g., join and aggregation) still challenging current systems, key performance issues is network communication time. State-of-the-art methods trying to improve that problem focus on either application-layer localit...

In this paper we propose SCDP, a general-purpose data transport protocol for centres that, in contrast to all other protocols proposed date, supports efficient one-to-many and many-to-one communication, which is extremely common modern centres. SCDP does so without compromising on efficiency short long unicast flows. achieves by integrating RaptorQ codes with receiver-driven transport, packet t...

With the evolution of geographically distributed data centers in Cloud Computing landscape along with amount being processed these centers, which is growing at an exponential rate, processing massive applications become important topic. Since a given task may require many datasets for its execution and are spread over several different finding efficient way to manage storage across nodes system...

Cloud Computing, the long-held dream of computing as a utility, has the potential to transform a large part of the IT industry, making software even more attractive as a service and shaping the way IT hardware is designed and purchased. Virtualization technology forms a key concept for new cloud computing architectures. The data centers are used to provide cloud services burdening a significant...