主要服务器将使用暂存目录中的文件，并在实际应用或暂存将保存到主要服务器的日志数据缓存之前，应立即识别对它的接收。

Primary in to files in the staging directory. It immediately acknowledges receipt of the log data buffer to the primary before it actually applies or stages it.

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首先，您需要编写能够接收并缓存连接的后端服务器。

First of all, you need to write a back-end server that can accept connections and cache them.

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客户端可以向服务器发送针对某个缓存文件的请求，并且只会接收到一个304 Not Modified回复。

The client might send a request for a cached file to the server only to receive a 304 Not Modified reply.

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