重用连接还是为了频繁发送数据而更新它们会更好吗? [英] Is it better to reuse connections, or renew them for sending data frequently?

问题描述

我有一个TCP服务器应用程序，它侦听来自客户端的连接，这些客户端以相当小的间隔(约20秒)频繁发送心跳"数据包.有几百个这样的客户，最多为1000个.

I have a TCP server application which listens for connections from clients that send "heartbeat" packets frequently in rather small intervals, around 20 seconds. There are a few hundred such clients, 1000 at most.

先前已实现(不是由我执行)，以便为每个心跳建立一个新的TCP连接，然后将其关闭.

It has previously been implemented (not by me) such that a new TCP connection is established for every heartbeat, then it is closed.

在我看来，保持连接打开并将其重新用于通信会更好，但是我不确定.重新建立连接是否浪费时间和带宽并保持数百个打开的连接(对于服务器而言)不是问题，或者相反，不关闭它们会浪费大量资源吗?

It seems to me that it would be better to keep the connection open and reuse it for the communication, but I'm not sure. Is re-establishing the connections a waste of time and bandwidth and keeping a few hundred open connections (in the server's case) not a problem, or, on the contrary, is it a big waste of resources not to close them?

推荐答案

最好的选择取决于您拥有的内存量，连接的延迟时间和心跳的频率:

It depends on the amount of memory you have, of the latency of the connection and of the frequency of the heartbeat what the best options is:

• 每个TCP连接都需要1xRTT的时间来建立，因此每次创建一个新的连接都花费大量的时间，但没有资源.
• 每个打开的TCP连接的状态都需要保留在系统上，这意味着它占用了内存资源.

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