MySQL ibdata多路径扩容

vi /etc/my.cnf

innodb_data_home_dir =

innodb_data_file_path= /data/mysql/ibdata1:10M:autoextend（为目前ibdata情况）

[[email protected] mysql]#mkdir -p /data2/mysql

[[email protected]]# chown -R mysql:mysql/data2

[[email protected] scripts]#du -sh /data/mysql/ibdata1

74M        /data/mysql/ibdata1

-rw-rw---- 1 mysqlmysql  77594624 Mar 25 16:21 ibdata1

[[email protected] mysql]# vi/etc/my.cnf

修改ibdata1为刚刚查出的大小，精确到M，过大或过小起库时都会报错，并添加ibdata2

innodb_data_file_path= /data/mysql/ibdata1:74M;/data2/mysql/ibdata2:10M:autoextend

起库

[[email protected] mysql]#/etc/init.d/mysqld start

Starting MySQL..SUCCESS!

注：如果ibdata1中的值没有精确计算，调为75M或者更大，亦或者更小，都会导致起库报如下错误：

[[email protected] mysql]#/etc/init.d/mysqld start

Starting MySQL.ERROR! The server quit without updating PID file (/data/mysql/HE1.pid).

起库后可以看到扩容的ibdata2

[[email protected] mysql]# cd/data2/mysql/

[[email protected] mysql]# ll

total 10240

-rw-rw---- 1 mysqlmysql 10485760 Mar 25 16:27 ibdata2

[[email protected] mysql]# du-sh *

10M        ibdata2