PERFORMANCE METRICS

• concurrency
• definition: the maximum number of clients that can independently access a multimedia document
• higher concurrency  minimizes the need for document replication
• access latency
• definition: amount of time a client has to wait after sending a request to the server, to receive the multimedia document
• operation latency
• definition: amount of time required for an interactive operation such as fast forward or pause to be effective
• should be independent of the load of the server
• scalability
• the throughput should scale with the number of clients
• the server should support heterogeneous clients and multimedia data
• extendibility
• the server should support all possible application scenarios and service models