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http://dx.doi.org/10.9717/kmms.2012.15.5.651

A Hybrid Storage Architecture with a Content Caching Algorithm for Networked Digital Signage  

Nam, Young-Jin (대구대학교 컴퓨터.IT공학부)
Jeong, Soon-Hwan (대구대학교 컴퓨터.IT공학부)
Park, Young-Kyun (대구대학교 컴퓨터.IT공학부)
Publication Information
Journal of Korea Multimedia Society / v.15, no.5, 2012 , pp. 651-663 More about this Journal
Abstract
Networked digital signage downloads necessary multimedia contents from a large-sized storage on WAN to its local disk of a limited size before starting their playback. If the required time to download the entire contents gets longer, a start time to play the contents at the digital signage could be delayed. In this paper, we propose a hybrid storage architecture that not only inserts an iSCSI storage layer between the existing local disk and the WAN storage, but offers a contents caching scheme in order to obtain all the necessary contents in digital signage rapidly. The proposed caching scheme determines how to place the downloaded contents both in the local disk and the iSCSI storage. Uniquely, the proposed caching scheme manages the iSCSI storage space by dividing it into two regions: (1) in one region, the digital signage can play the contents directly without downloading them into the local disk; (2) in the other region, the digital signage cannot. Performance evaluations on a simulator and an actual system with workloads of various contents show that a contents-downloading time of the hybrid storage architecture is at maximum three times shorter than that of the existing storage architecture.
Keywords
digital signage; storage; multimedia contents; caching; iSCSI;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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