Title :
Dedicated Disk I/O Strategies for IPTV Live Streaming Servers Supporting Timeshift Functions
Author :
Huang Cheng ; Zhu Chenjie ; Li Yi ; Ye Dejian
Author_Institution :
Fudan Univ., Shanghai
Abstract :
By carefully studying the characteristics of IPTV (Internet Protocol Television) live streaming service supporting timeshift functions, we find the default disk I/O strategies of universal OS can not provide satisfactory performance. Based on these observations, this paper proposes a set of dedicated disk I/O strategies in the design and implementation of a live streaming server supporting timeshift functions. Our proposed strategies include asynchronous direct I/O, block-level data processing, media caching and media prefetching, which are implemented in a live streaming server (ClearServer) developed by ourselves. ClearServer has been successfully deployed in the Shanghai Zhabei IPTV test-bed. Based on the deployment, detailed performance evaluation and test results demonstrate that the proposed strategies significantly improve several major performance metrics of the IPTV live streaming servers.
Keywords :
cache storage; digital television; media streaming; multimedia servers; IPTV live streaming server; Internet protocol television; block-level data processing; disk I/O strategy; media caching; media prefetching; timeshift function; Application software; Computer networks; Data processing; IPTV; Network servers; Prefetching; Streaming media; Testing; Video on demand; Watches;
Conference_Titel :
Computer and Information Technology, 2007. CIT 2007. 7th IEEE International Conference on
Conference_Location :
Aizu-Wakamatsu, Fukushima
Print_ISBN :
978-0-7695-2983-7
DOI :
10.1109/CIT.2007.181
