TTCP

https://en.wikipedia.org/wiki/Transmission_Control_Protocol

implementations and dertvatives: Iperf

What performmance do we care?

• 带宽
• 吞吐量
• 延迟
• 资源使用率

• 额外开销

  • 先压缩后加密, 否则起不到压缩的作用了

    Why do we re-implement TTCP?

    

• 基于常用的Socker API

• TTCP协议有格式的; echo通常是接受什么, 发送什么, 忽略TCP的格式
• 使用TCP的典型协议
• 可以使用多种语言实现
• 没有并发连接

The Protocol

请求-响应协议

• 收到Ack, 才会返回Payload

The Code

Straight forward with blocking IO/ 直线型阻塞IO

• muduo/blob/master/examples/ace/ttcp/ttcp_blocking.cc
  • C with sockets API
• recipes/blob/master/tpc/bin/ttcp.cc
  • C++ with a thin wrapper
• muduo-examples-in-go/blob/master/examples/ace/ttcp/ttcp.go

Non-blocking IO with muduo library

• muduo/blob/master/examples/ace/ttcp/ttcp.cc

  代码复杂, 性能并未提升

None of above support concurrent connections

• Pretty easy to anable, thread-per-connections for first three

  不支持并发连接