Conception et performances d'un systeme de stockage video distribue et tolerant aux pannes

摘要

We describe the design and the implementation of the CFS (Cluster File System) storage system which is dedicated to video streams. Our goal is to provide a system with the following features: 1) High number of supported steams at low cost. 2) Transparent management with respect to the clients. 3) Reliability regarding data storage and service continuity. The CFS is implemented on a cluster of PCS connected with a high speed internal network. Its management is fully distributed among the cluster nodes so that there is no central component. Data is stored and retrieved among the cluster nodes using a Streaming RAID strategy, to enhance reliability; We experimentally measured the CFS performance in terms of number of supported clients. We also evaluated the cost of the fault tolerance strategy.