os version: Red Hat Enterprise Linux Server release 6.5 (Santiago)

mysql version: mysql5.6.34-log

安装方式：源码安装

场景：最近在初始化mysql的多实例过程种，突然遇到如下问题，初始化过程如下，在设定basedir和datadir参数后，进行数据库实例初始化时，就一直hang住了，如下,

做了如下的尝试操作:

(1) 使用root用户来进行安装；

(2) 切换数据库实例的安装目录；

[mysql@slave3 ~/mysql/scripts]./mysql_install_db --basedir=/home/mysql/mysql/ --datadir=/mnt/data6/mysqldata2/mydata
Installing MySQL system tables...2016-10-27 10:56:34 0 [Warning] Using unique option prefix collation instead of collation-server is deprecated and will be removed in a future release. Please use the full name instead.
2016-10-27 10:56:34 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-10-27 10:56:34 0 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap.
2016-10-27 10:56:34 0 [Note] /home/mysql/mysql//bin/mysqld (mysqld 5.6.34-log) starting as process 55964 ...
2016-10-27 10:56:34 55964 [Warning] Using pre 5.5 semantics to load error messages from /home/mysql/mysql/share/english/.
2016-10-27 10:56:34 55964 [Warning] If this is not intended, refer to the documentation for valid usage of --lc-messages-dir and --language parameters.

额外还尝试了其它多种方法，但是都不实用，起初有怀疑是不是限制了磁盘配额，但是并不是。

直到最后，初始化都仅仅是在/mnt/data6/mysqldata2/mydata目录下建立了２个文件件，mysql, test

原因：直到现在也不清楚

解决方法：./mysql_install_db --basedir=/home/mysql/mysql/ --datadir=/mnt/data6/mysqldata2/mydata　--no-defaults