کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
432458 688901 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
CEA: A Cyclic Expansion Algorithm for data migration in parallel video servers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نظریه محاسباتی و ریاضیات
پیش نمایش صفحه اول مقاله
CEA: A Cyclic Expansion Algorithm for data migration in parallel video servers
چکیده انگلیسی

Parallel video servers can achieve highly storage-saving and granularly load-balancing, but they suffer from a system expansion problem. As the number of users continuously increases, the system inevitably needs to expand the number of video servers. However, the expansion of a parallel video server system is not as simple as that of a replicated video server system. Hence, this work develops an efficient expansion algorithm, called the Cyclic Expansion Algorithm (CEA), for parallel video servers. The proposed CEA algorithm has several good features. First, the data layout of each video content exhibits periodicity. Consequently, the meta-data size of each video and the complexity of the CEA algorithm are reduced. Second, the number of required data movements during a system expansion is optimized. Third, the total number of required XOR recomputations for updating parity blocks during an expansion is also minimized. Additionally, the new CEA can be applied to a variety of distributed storage systems, such as the cloud-based storage systems using striping and parity check techniques.


► Parallel video servers are highly storage-saving and granularly load-balancing.
► System expansion issues for parallel video servers are rarely investigated.
► Both data migration and redundant update overheads are optimized in CEA.
► In CEA, storage overhead is negligible and a lower expansion cost can be achieved.
► The proposed CEA can also be applied to other cloud-based storage systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Parallel and Distributed Computing - Volume 72, Issue 7, July 2012, Pages 868–879
نویسندگان
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