Hybrid Storage Architecture for Networked Digital Signage Systems

Abstract

Digital signage has recently been highlighted as one of the next-generation digital media. It plays a given series of various quality multimedia contents after downloading them into its local disk of limited size from large-sized storage over WAN (like FTP server). In other words, the beginning of its play time can be delayed to some extent if the contents download time becomes longer. In this paper, we propose hybrid storage architecture for networked digital signage to speed up the contents download time. The proposed architecture not only includes an iSCSI storage layer between its local disk and WAN-based large-sized storage, but also provides a novel content caching algorithm. Extensive performance experiments on a simulator and its prototype with various workloads show that the proposed architecture outperforms other possible architectures in terms of the contents download time by three times.