mariadb安装

cd /usr/local/src
wget https://downloads.mariadb.com/MariaDB/mariadb-10.2.6/bintar-linux-glibc_214-x86_64/mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz
tar zxvf mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz
mv mariadb-10.2.6-linux-glibc_214-x86_64 /usr/local/mariadb
cd /usr/local/mariadb
./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mariadb/ --datadir=/data/mariadb
cp support-files/my-small.cnf /usr/local/mariadb/my.cnf
vi /usr/local/mariadb/my.cnf //mysqld下定义datadir //这里更改调优和主从。
cp support-files/mysql.server /etc/init.d/mariadb
vim /etc/init.d/mariadb //定义basedir、datadir、conf以及启动参数
conf 指定配置文件所在路径 conf=$basedir/my.cnf或者conf=/usr/local/mariadb/my.cnf
如果服务器只装了mariadb，那么my.cnf就可以装在/etc下，启动脚本就不需要定义conf变量了。
在搜索start启动脚本
$bindir/mysqld_safe --defaults-file="$conf" --datadir="$datadir" --pid-file="$mysqld_pid_file_path" "$@" &

/etc/init.d/mariadb start
ps -aux|grep mariadb

ls support-files/
binary-configure my-large.cnf mysql-log-rotate wsrep_notify
magic my-medium.cnf mysql.server
my-huge.cnf my-small.cnf policy
my-innodb-heavy-4G.cnf mysqld_multi.server wsrep.cnf

my-small.cnf //根据内存的大小选择。它们的区别在于缓存的大小不一样。