data center energy consumption has become one of the top concerns in designing and operating large-scale data centers as cloud service providers such as Amazon, Google, IBM and Microsoft have begun to establish more d...
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ISBN:
(纸本)9781509062966
data center energy consumption has become one of the top concerns in designing and operating large-scale data centers as cloud service providers such as Amazon, Google, IBM and Microsoft have begun to establish more data centers in response to growing requests in clouds. In recent years, extensive efforts have been put into the research of reducing the energy consumption of servers. With the improvement of sever energy efficiency, the energy consumption of data center network, which could account for 10%-20% of the total energy expenditure of a data center, has emerged as a substantial issue. Modern data center networks often use a fat-tree network topology because of its high bisection bandwidth. In this paper, we develop a power and performance aware routing algorithm for fat tree networks that dynamically consolidate network flows and turn off unused network switches in order to reduce network energy consumption while meeting the network performance requirement.
Smoking is arguably one of the most harmful lifestyle behaviors with well-known relations to dozens of diseases. As a consequence, smoking monitoring and cessation support have been popular targets for the emerging fi...
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Economic Denial of Sustainability (EDoS) attack is one of the major web security attacks performed on cloud hosted websites that exploits cloud’s utility model by fraudulently consuming metered resources such as netw...
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Information Systems (ISs) are fundamental to streamline operations and support processes of any modern enterprise. Being able to perform analytics over the data managed in various enterprise ISs is becoming increasing...
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ISBN:
(纸本)9781538625880
Information Systems (ISs) are fundamental to streamline operations and support processes of any modern enterprise. Being able to perform analytics over the data managed in various enterprise ISs is becoming increasingly important for organisational growth. Extract, Transform, and Load (ETL) are the necessary pre-processing steps of any data mining activity. Due to the complexity of modern IS, extracting data is becoming increasingly complicated and time-consuming. In order to ease the process, this paper proposes a methodology and the results of a pilot implementation, that aims to simplify data extraction process by leveraging the end-users' knowledge and understanding of the specific IS.
Text mining has been successfully used to discover interesting patterns and extract useful information from analyzing massive text data exists on the internet, books and other text sources. Computer science education ...
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Embedded virtualization systems become increasingly important in the light of mobile computing era. Current OKL4 technology has overcome some limitations of plain virtualization by introducing microkernel approach but...
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ISBN:
(纸本)9781538625880
Embedded virtualization systems become increasingly important in the light of mobile computing era. Current OKL4 technology has overcome some limitations of plain virtualization by introducing microkernel approach but also imposes several concerns including incomplete IPC (InterProcess Communication). With this in mind, in this paper a novel asynchronous communication mechanism to optimize original OKL4 IPC mechanism is proposed. The mechanism is able to effectively deal with concurrent communication requests between any virtual machines (VMs) by generating multiple event channels and providing a complete management mechanism. Further, a shared-memory-based bulk data transfer mechanism based on asynchronous communication mechanism is proposed to enrich OKL4 primitive data exchange approaches. In the end, the promising experiment results prove the feasibility and effectiveness of the mechanisms.
In this paper, we present an efficient type-agnostic approach for finding sub-sequences in data, such as text documents or GPS trajectories. Our approach relies on data deduplication for creating an inverted index. In...
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ISBN:
(纸本)9781538625880
In this paper, we present an efficient type-agnostic approach for finding sub-sequences in data, such as text documents or GPS trajectories. Our approach relies on data deduplication for creating an inverted index. In contrast with existing data deduplication techniques that split raw sequences of characters arbitrarily, our approach preserves the semantics of the original sequence via the notion of token and can be used to index normalized data. When compared to indexing methods that preserve the semantics and operate on normalized data, our method increases the relevance of the inverted index, reduces its size and improves its performances. As data normalization is generally not used beyond the scope of textual data, we introduce a framework that helps identify the extent to which data should be normalized regardless of its type. On this basis, we demonstrate with a dataset made of GPS trajectories that our method can be used agnostically: it can be used to index and query data of a completely different type. Finally, we show that the resulting spatial-index is characterized by a better discrimination than classic spatial-indexing approaches.
The rise of big data age in the Internet has led to the explosive growth of data size. However, trust issue has become the biggest problem of big data, leading to the difficulty in data safe circulation and industry d...
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ISBN:
(纸本)9781538633496
The rise of big data age in the Internet has led to the explosive growth of data size. However, trust issue has become the biggest problem of big data, leading to the difficulty in data safe circulation and industry development. The blockchain technology provides a new solution to this problem by combining non-tampering, traceable features with smart contracts that automatically execute default instructions. In this paper, we present a credible big data sharing model based on blockchain technology and smart contract to ensure the safe circulation of data resources.
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