TCP keepalive的典型用法是什么? [英] What is the typical usage of TCP keepalive?
问题描述
请考虑存在一个服务器和多个客户端的情况.每个客户端创建TCP连接以与服务器交互. TCP活着有三种用法:
Consider a scenario where exists one server and multiple clients. And each client creates TCP connections to interact with the server. There are three usages of TCP alive:
- 服务器端keepalive:服务器发送TCP keepalive以确保客户端处于活动状态.如果客户端已死，则服务器将关闭与客户端的TCP连接.
- 客户端的保持活动状态:客户端发送TCP保持活动状态，以防止服务器关闭与客户端的TCP连接.
- 双方keepalive:服务器和客户端均按照1和2中的说明发送TCP keepalive.
以上典型的TCP keepalive用法是什么?
Which of the above usages of TCP keepalive are typical?
推荐答案
服务器端keepalive:服务器发送TCP keepalive以确保客户端处于活动状态.如果客户端已死，则服务器将关闭与客户端的TCP连接.
Server-side keepalive: The server sends TCP keepalive to make sure that the client is alive. If the client is dead, the server closes the TCP connection to the client.
如果客户端已死，则服务器会在连接后 出现连接重置"错误.
If the client is dead, the server gets a 'connection reset' error, after which it should close the connection.
客户端Keepalive:客户端发送TCP keepalive，以防止服务器关闭与客户端的TCP连接.
Client-side keepalive: Clients sends TCP keepalive to prevent the server from closing the TCP connection to the client.
不.客户端发送keepalive，以便如果服务器已死，则客户端将收到连接重置"错误，然后应关闭连接.
No. Client sends keepalive so that if the server is dead, the client will get a 'connection reset' error, after which it should close the connection.
双方保持联系
Both-side keepalive
如上所述，由于keepalive失败，双方都能进行连接重置".
Both sides are capable of getting a 'connection reset' due to keepalive failure, as above.
以上用法是典型的吗?
Whuch of the above usages is typical?
其中任何一个，或者一个都没有.如果对等方定期发送消息，则也实际上不需要保持活动状态.因此，对于服务器而言，它通常比客户机更有用.
Any of them, or none. If a peer is sending regularly it doesn't really need keepalive as well. It is therefore often of more use to a server than a client.
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