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Today's server environments consist of many machines constructing clusters for distributed computing system or storage area networks (SAN) for effectively processing or saving enormous data. In these kinds of server environments, backend-storages are usually the bottleneck of the overall system. But it is not enough to simply replace the devices with better ones to exploit their performance benefits...
Thesedays, along with read()/write(), mmap() is used to file I/O in data-intensive applications as an alternative method of I/O on emerging low-latency device such as flash-based SSD. Although utilizing memory-mapped file I/O have many advantages, it does not produce much benefit when combined with large-scale data and fast storage devices. When the working set of an application accessing file with...
Distributed systems have led to the adoption of cloud computing concepts among countless enterprises. A large number of companies have already benefited from delegating IT services to cloud service providers. At the same time, the interest on energy efficiency has dramatically increased. Energy efficiency in large distributed systems is a big concern for system engineers. In addition, the proliferation...
In this paper, we introduce the tele-management model in our intelligent ubiquitous middleware, SmartUM. The tele-management model provides capabilities needed by remote administrators. The primary goal of these systems is to enable remote management of facilities for individual administrators through the ubiquitous grid middleware. To do so, remote administrators can control facilities while see...
The performance of computer systems depends on relatively slow disk I/O performance. In order to improve the disk I/O performance, it is required to reduce a mechanical delay induced by the disk I/O operations. Several approaches have been proposed for it. However, because hard-disk storage hides too much information to the outside world, it makes difficult to predict exact internal layout of disk...
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