在我的 my.cnf 中，我写道:
[mysqld_multi]
mysqld = /usr/local/Cellar/mysql/5.7.11/bin/mysqld_safe
mysqladmin = /usr/local/Cellar/mysql/5.7.11/bin/mysqladmin
user = root
password =
[mysqld1]
pid-file = /usr/local/etc/mysql/mysqld.pid
socket = /usr/local/etc/mysql/mysqld.sock
port = 3306
datadir = /usr/local/var/mysql
log-bin=mysql-bin
server-id=1
[mysqld2]
pid-file = /usr/local/etc/mysql/mysqld1.pid
socket = /usr/local/etc/mysql/mysqld1.sock
port = 3307
datadir = /usr/local/var/mysql1
server-id=2
language=/usr/local/Cellar/mysql/5.7.11/share/mysql/english
user=mysql
然后我执行mysqld_multi start 2，并得到错误信息:
Installing new database in /usr/local/var/mysql1
2016-09-19 19:37:16 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2016-09-19 19:37:16 [ERROR] Can't locate the language directory.
FATAL ERROR: Tried to start mysqld under group [mysqld2],
but no data directory was found or could be created.
data directory used: /usr/local/var/mysql1
我无法启动mysql进程，请问是什么问题？看来目录/usr/local/var/mysql1有问题，但该目录确实存在，令人困惑。
最佳答案
似乎 mysqld_multi 没有修复为使用 mysqld --initialize。
您必须运行 mysqld --initialize 以及该服务器 my.cnf 中所有与目录相关的选项。
(来自评论)
您还可以按照 Running two instances of mysql 中的说明修复 mysqld_multi 脚本。 .
关于mysql - 为什么mysqld_multi无法启动mysql？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39572451/