redis 超时时间

Question

$redis->connect('192.168.200.253', 637912,3);
有个疑问，这个3秒是指连接上以后3秒后断开，还是3秒没连接上认为是超时呢？这个连接超时到底是指没连接上的超时还是连接上以后的的超时。

Answer 1

• Generally speaking, the timeout time of the connect function refers to the link waiting time in TCP, that is, the link establishment time is 3 seconds. If the link is not successful in 3 seconds, the function returns.

• In addition, by default, the server side of redis will automatically kill the link if there is no access for 5 seconds. The client side is not aware of this. It is best to judge the availability of the connection every time it is used; it is recommended to call it when there is no data access for 5 seconds. Ping/pang mechanism to prevent link failure;

Answer 2

There are many PHP drivers for redis => http://redis.io/clients#php I don’t know which one you are using.
But written in the parameters of the connect method, it should be the timeout for establishing the link.

Answer 3

Generally speaking, what comes with connect is the timeout of the connection.