Building a Performance Model of Streaming Media Applications in Utility

Cherkasova, Ludmila ; Staley, Loren

HP Development Company

关键词: Utility Data Centers;    enterprise media servers;    media system benchmarks;    measurements;    capacity metrics;    media server capacity;    performance models;   

RP-ID  :  HPL-2003-15

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

Utility Data Center (UDC) provides a flexible, cost- effective infrastructure to support the hosting of applications for Internet services. In order to enable the design of a ``utility-aware'' streaming media service which automatically requests the necessary resources from UDC infrastructure, we introduce a set of benchmarks for measuring the basic capacities of streaming media systems. The benchmarks allow one to derive the scaling rules of server capacity for delivering media files which are: i) encoded at different bit rates, ii) streamed from memory vs disk. Using an experimental testbed, we show that these scaling rules are non-trivial. In this paper, we develop a workload-aware, media server performance model which is based on a cost function derived from the set of basic benchmark measurements. We validate this performance model by comparing the predicted and measured media server capacities for a set of synthetic workloads. Notes: A shorter version of this paper will be published in IEEE/ACM International Symposium on Cluster and the Grid (CCGrid 2003) 12-15 May 2003, Tokyo, Japan 12 Pages