Large scale network measurement systems based on file storage have some shortages such as complicated designing, poor real-time transmitting capability, and etc.

传统基于文件存储的大规模网络测试系统存在设计复杂、实时性差等不足。

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When another process tries to truncate the file you are transmitting, the kernel sends you a real-time signal, the RT_SIGNAL_LEASE signal.

当另外一个进程试图将你正在传输的文件截断时，内核会向你的进程发送实时信号——RT_SIGNAL_LEASE。

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At last, in the fifth chapter, we designed and realized a real-time video streaming transmitting system.

最后在第五章中，对一个多路的实时视频流的传输系统进行了设计和实现。

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