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前言:领导要求在1台DELL R710上安装多个mysql实例
一、安装第1个实例
1、当前系统
cat /etc/debian_version
6.0.10
2、查看安装包
apt-cache search mysql-server|grep "mysql-server"
mysql-server-5.1 - MySQL database server binaries and system database setup
mysql-server-core-5.1 - MySQL database server binaries
mysql-server - MySQL database server (metapackage depending on the latest version)
3、安装mysql(会安装mysql相关的一系列的包)
apt-get -y install mysql-server --force-yes
二、安装第二个实例
1、创建目录(我这边将第二个实例安装在/opt下)
cd /opt/
mkdir mysql3307
2、复制mysql表和配置文件
cd /var/lib/mysql/
cp -a mysql /opt/mysql3307/
cp /etc/mysql/my.cnf /opt/mysql3307/
3、修改配置(一般就是改下port和sock和pid和datadir路径)
port            = 3307
socket          = /var/run/mysqld/mysqld3307.sock
pid-file        = /var/run/mysqld/mysqld3307.pid
datadir         = /opt/mysql3307
4、给mysql权限
chown -R mysql.root /opt/mysql3307/
5、启mysql(这里使用mysql用户启)
修改/etc/passed文件
mysql:x:102:104:MySQL Server,,,:/var/lib/mysql:/bin/bash
su - mysql
/usr/sbin/mysqld --defaults-file=/opt/mysql3307/my.cnf --basedir=/usr --datadir=/opt/mysql3307/ --user=mysql --pid-file=/var/run/mysqld/mysqld3307.pid --skip-external-locking --port=3307 --socket=/var/run/mysqld/mysqld3307.sock &
[1] 2484
150505  9:30:06 [Note] Plugin 'FEDERATED' is disabled.
150505  9:30:07  InnoDB: Initializing buffer pool, size = 8.0M
150505  9:30:07  InnoDB: Completed initialization of buffer pool
InnoDB: The first specified data file ./ibdata1 did not exist:
InnoDB: a new database to be created!
150505  9:30:07  InnoDB: Setting file ./ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
150505  9:30:07  InnoDB: Log file ./ib_logfile0 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile0 size to 5 MB
InnoDB: Database physically writes the file full: wait...
150505  9:30:07  InnoDB: Log file ./ib_logfile1 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile1 size to 5 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
150505  9:30:07  InnoDB: Started; log sequence number 0 0
150505  9:30:07 [Note] Event Scheduler: Loaded 0 events
150505  9:30:07 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.1.73-1'  socket: '/var/run/mysqld/mysqld3307.sock'  port: 3307  (Debian)
6、最后查看2个mysql实例是否正常运行着
ps aux|grep mysql
root      2152  0.0  0.0   3956   616 ?        S    08:53   0:00 /bin/sh /usr/bin/mysqld_safe
mysql     2276  0.0  3.6 182456 37560 ?        Sl   08:53   0:01 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
root      2277  0.0  0.0   5348   688 ?        S    08:53   0:00 logger -t mysqld -p daemon.error
mysql     2480  0.0  0.1  36884  1232 pts/0    S    09:29   0:00 su - mysql
mysql     2481  0.0  0.1  19220  1976 pts/0    S    09:29   0:00 -su
mysql     2484  5.5  3.6 174064 37004 pts/0    Sl   09:30   0:00 /usr/sbin/mysqld --defaults-file=/opt/mysql3307/my.cnf --basedir=/usr --datadir=/opt/mysql3307/ --user=mysql --pid-file=/var/run/mysqld/mysqld3307.pid --skip-external-locking --port=3307 --socket=/var/run/mysqld/mysqld3307.sock
mysql     2495  0.0  0.1  16340  1136 pts/0    R+   09:30   0:00 ps aux
mysql     2496  0.0  0.0   7548   820 pts/0    S+   09:30   0:00 grep mysql
7、登陆2个mysql实例看下
mysql -uroot -predhat -S /var/run/mysqld/mysqld.sock
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 54
Server version: 5.1.73-1 (Debian)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> quit
Bye
mysql -uroot -predhat -S /var/run/mysqld/mysqld3307.sock
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.1.73-1 (Debian)Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> quit
Bye
mysql@10:~$
三、引擎
当前版本引擎
mysql -uroot -predhat -S /var/run/mysqld/mysqld.sock -e "show engines;"
+------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine     | Support | Comment                                                        | Transactions | XA   | Savepoints |
+------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB     | YES     | Supports transactions, row-level locking, and foreign keys     | YES          | YES  | YES        |
| MRG_MYISAM | YES     | Collection of identical MyISAM tables                          | NO           | NO   | NO         |
| BLACKHOLE  | YES     | /dev/null storage engine (anything you write to it disappears) | NO           | NO   | NO         |
| CSV        | YES     | CSV storage engine                                             | NO           | NO   | NO         |
| MEMORY     | YES     | Hash based, stored in memory, useful for temporary tables      | NO           | NO   | NO         |
| FEDERATED  | NO      | Federated MySQL storage engine                                 | NULL         | NULL | NULL       |
| ARCHIVE    | YES     | Archive storage engine                                         | NO           | NO   | NO         |
| MyISAM     | DEFAULT | Default engine as of MySQL 3.23 with great performance         | NO           | NO   | NO         |
+------------+---------+----------------------------------------------------------------+--------------+------+------------+
配置修改默认引擎为innodb
是在[mysqld]这个里面
default_table_type = innodb
5.5的话默认引擎直接是innodb了 不需要修改