mysql - 多源复制MySQL中特定从站的主站数量？

Question

Mysql推出了一项新功能，即单个从服务器具有多个主服务器，其中可以借助称为 channel 的标志为每个单独的主服务器处理复制。

我想知道:

What's the max number of master a slave can have ?
Or 
max number of channels a slave can have ?

谢谢

Answer 1

in MySQL 5.7, the maximum number of channels that can be added to one slave in a multi-source replication topology is 256.

来源:https://dev.mysql.com/doc/refman/5.7/en/replication-channels.html