播出服务器磁盘I/O与缓存性能分析

Disk I/O and Buffer Performance Analysis of Broadcast Server

针对电视台专业播出服务器在播出质量和播出性能上的高要求,提出了(s,S)策略下读数据缓存和复用缓存与节目数量、节目数据速率、磁盘性能、ASI卡缓存大小的关系。在此基础上进行的实验结果表明:分配给节目播出的读数据和复用缓存并不是越大越好,而是有一个较优的范围。据此可对服务器的资源分配进行优化。

The special broadcast server of TV station requires owning excellent quality and performance of broadcast. According to the （s, S） strategy, the authors propose the relation of between read buffer, multiplex buffer and program number, data velocity, disk performance, and ASI buffer. The experiment result shows that the read buffer and multiplex buffer will work better on a suitable buffer size range. Base on this result, we can optimize the server resource allocating.