Increasing Internet business and computing footprint motivate server consolidation in data centers. Through virtualization technology, server consolidation can reduce physical hosts and provide scalable services. Howe...
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ISBN:
(纸本)9780769545769
Increasing Internet business and computing footprint motivate server consolidation in data centers. Through virtualization technology, server consolidation can reduce physical hosts and provide scalable services. However, the ineffective memory usage among multiple virtual machines (VMs) becomes the bottleneck in server consolidation environment. Because of inaccurate memory usage estimate and the lack of memory resourcemanagements, there is much service performance degradation in data centers, even though they have occupied a large amount of memory. In order to improve this scenario, we first introduce VM's memory division view and VM's free memory division view. Based on them, we propose a hierarchal memory service mechanism. We have designed and implemented the corresponding memory scheduling algorithm to enhance memory efficiency and achieve service level agreement. The benchmark test results show that our implementation can save 30% physical memory with 1% to 5% performance degradation. Based on Xen virtualization platform and balloon driver technology, our works actually bring dramatic benefits to commercial cloud computing center which is providing more than 2,000 VMs' services to cloud computing users.
The inclusion of reconfigurable processors in distributed grid systems promises to offer increased performance without compromising flexibility. Consequently, these large-scale distributed grid systems (such as Tera-G...
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resourcescheduling is crucial to data centers. However, most existing resourcescheduling algorithms focus only on one-dimensional resource models, ignoring the fact that multiple resources (e.g. CPU, memory, storage...
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Energy-efficiency is becoming one of the most critical issues in embedded system design. In Network-on-Chip (NoC) based heterogeneous Multiprocessor systems, the energy consumption is influenced dramatically by task a...
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ISBN:
(纸本)9780769543284
Energy-efficiency is becoming one of the most critical issues in embedded system design. In Network-on-Chip (NoC) based heterogeneous Multiprocessor systems, the energy consumption is influenced dramatically by task allocation schemes. Although various approaches are proposed to allocate tasks in an energy-efficient way, existing work does not well explore the tradeoff between the two major power consumers, namely the processors and network links, resulting in suboptimal mappings from a system point of view. In this paper, we first extend the existing Integer Linear Programming (ILP) formulation to take both processing and communication energy into account. Thereafter, we propose a Simulated Annealing with Timing Adjustment (SA-TA) heuristic to accelerate the optimization process. While the SA-TA algorithm achieves performance very close to the global optimum, significant improvement in computation speed is observed.
Grid Computing provides sharing of geographically distributedresources among large scale complex applications. Due to dynamic nature of resources in grid, there is a need of highly efficient job scheduling and resour...
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Energy consumption in large-scale distributedsystems, such as computational grids and clouds gains a lot of attention recently due to its significant performance, environmental and economic implications. These system...
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The proceedings contain 153 papers. The topics discussed include: scheduling mixed real-time and non-real-time applications in MapReduce environment;hypervisor support for efficient memory de-duplication;a hierarchica...
ISBN:
(纸本)9780769545769
The proceedings contain 153 papers. The topics discussed include: scheduling mixed real-time and non-real-time applications in MapReduce environment;hypervisor support for efficient memory de-duplication;a hierarchical memory service mechanism in server consolidation environment;a method for improving concurrent write performance by dynamic mapping virtual storage system combined with cache management;fair and efficient online adaptive scheduling for multiple sets of parallel applications;combining multiple metrics to control BSP process rescheduling in response to resource and application dynamics;broadcasting on large scale heterogeneous platforms with connectivity artifacts under the bounded multi-port model;architecture-aware mapping and optimization on a 1600-Core GPU;simulation-based performance analysis and tuning for a two-level directly connected system;and ANEPROF: energy profiling for android java virtual machine and applications.
This book represents the combined peer-reviewed proceedings of the Fifth international Symposium on Intelligent distributed Computing -- IDC 2011 and of the Third internationalworkshop on Multi-Agent systems Technolo...
ISBN:
(纸本)9783642240126
This book represents the combined peer-reviewed proceedings of the Fifth international Symposium on Intelligent distributed Computing -- IDC 2011 and of the Third internationalworkshop on Multi-Agent systems Technology and Semantics -- MASTS 2011. Both events were held in Delft, The Netherlands during October 5-7, 2011. The 33 contributions published in this book address many topics related to theory and applications of intelligent distributed computing and multi-agent systems, including: adaptive and autonomous distributedsystems, agent programming, ambient assisted living systems, business process modeling and verification, cloud computing, coalition formation, decision support systems, distributed optimization and constraint satisfaction, gesture recognition, intelligent energy management in WSNs, intelligent logistics, machine learning, mobile agents, parallel and distributed computational intelligence, parallel evolutionary computing, trust metrics and security, scheduling in distributed heterogenous computing environments, semantic Web service composition, social simulation, and software agents for WSNs.
The proceedings contain 36 papers and 2 Power Point presentations. The topics discussed include: qualifying reliability of solid-state storage from multiple aspects;a program context-aware data separation technique fo...
ISBN:
(纸本)9781457704284
The proceedings contain 36 papers and 2 Power Point presentations. The topics discussed include: qualifying reliability of solid-state storage from multiple aspects;a program context-aware data separation technique for reducing garbage collection overhead in NAND flash memory;towards simulation of parallel file system scheduling algorithms with PFSsim;scalable distributed directory implementation on orange file system;hierarchical RAID (HRAID): organization, operation, reliability, and performance;a statistical evaluation of the impact of parameter selection on storage system benchmarks;performance models of flash-based solid-state drives for real workloads;sampling-based garbage collection metadata management for flash-based storage;data allocation strategies for the management of quality of service in virtualised storage systems;and RAID6L: a log-assisted RAID6 storage architecture with improved write performance.
Coordination of perioperative systems is a deeply collaborative process, distributed over time and space. The paper analyses coordination in a perioperative centre along the three temporal levels suggested in [1]: all...
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