Design and evaluation of a multimedia storage server for mixed traffic |
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Authors: | Igor DD Curcio Antonio Puliafito Salvatore Riccobene Lorenzo Vita |
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Affiliation: | (1) Speech and Audio Systems Laboratory, Nokia Research Center, FIN-33721 Tampere, Finland; e-mail: igor.curcio@research.nokia.com , FI;(2) Istituto di Informatica, Università di Catania, Viale A. Doria 6, I-95125 Catania, Italy; e-mail: {ap.lvita}@iit.unict.it , IT;(3) Dipartimento di Matematica, Università di Catania, Viale A. Doria 6, I-95125 Catania, Italy; e-mail: sriccobene@dipmat.unict.it , IT |
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Abstract: | The relative simplicity of access to digital communications nowadays and the simultaneous increase in the available bandwidth
are leading to the definition of new telematic services, mainly oriented towards multimedia applications and interactivity
with the user. In the near future, a decisive role will be played in this scenario by the providers of interactive multimedia
services of the on-demand type, which will guarantee the end user a high degree of flexibility, speed and efficiency. In this
paper, some of the technical aspects regarding these service providers are dealt with, paying particular attention to the
problems of storing information and managing service requests. More specifically, the paper presents and evaluates a new storage
technique based on the use of disk array technology, which can manage both typical multimedia connections and traditional
requests. The proposed architecture is based on the joint use of the partial dynamic declustering and the information dispersal
algorithm, which are employed for the allocation and retrieval of the data stored on the disk array. We also define efficient
strategies for request management in such a way as to meet the time constraints imposed by multimedia sessions and guarantee
good response times for the rest of the traffic. The system proposed is then analyzed using a simulation approach. |
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Keywords: | :Multimedia servers – Disk array – Video on demand – Request scheduling – Performance evaluation |
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