Performance of a storage system for supporting different video types and qualities

Jonathan C.L. Liu, Jenwei Hsieh, David H Du, Mengjou Lin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Future Video-On-Demand (VOD) servers will need to support many existing and emerging video data types. These data types include 15-fps (frames per second) animation, 30-fps NTSC (National Television Systems Committee) quality video and 60-fps HDTV (High Definition Television) video. The different display speeds and frame sizes of these various video types impose a major constraint on the design of VOD storage systems. This paper presents the results of an experimental study, conducted on a Silicon Graphics Inc. Onyx computer system, that investigated the impact of these video types on the design of a VOD storage system. The key issues involved in supporting these different video types in a VOD environment are: (1) the video allocation method, and (2) the proper block size (a block is a basic unit of several contiguous video frames that will be accessed from several disks each time a request is made) to use for data striping and retrieval. Two allocation schemes, logical volume striping and application level striping, along with varying frame and block sizes for each of the three different video data types are examined in this paper. The focus of our study is to determine the maximum number of concurrent accesses that can be supported with a guaranteed quality of service. The degree of scalability (i.e., striping data over more disk arrays) of the experimental VOD system used is also studied.

Original languageEnglish (US)
Pages (from-to)2-9
Number of pages8
JournalProceedings - IEEE INFOCOM
Volume1
StatePublished - Jan 1 1996
EventProceedings of the 1996 15th Annual Joint Conference of the IEEE Computer and Communications Societies, INFOCOM'96. Part 1 (of 3) - San Francisco, CA, USA
Duration: Mar 24 1996Mar 28 1996

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