MySQL二进制安装，升级，多实例部署

目标

理解线上部署考虑的因素

学会编译安装以及二进制安装mysql

学会升级mysql

学会多实例部署mysql数据库

学会合理部署mysql线上库

考虑因素：

版本选择，5.1,5.5还是5.6？

分支选择，官方社区版？percona server？mariadb?

推荐官方版，简单易上手

安装方式，包安装？二进制包安装？源码安装？

线上推荐二进制包安装

路径配置，参数配置(尽量模板化，标准化)

一个实例多个库，or多个实例单个库？

二进制安装mysql

下载软件安装包

解压放到指定目录(比如/usr/local)并将mysql目录放到PATH中

初始化实例，编辑配置文件 并启动

账号安全设置

1)下载

2)解压到指定目录，并将mysql目录放到PATH中

#tar -zxf mysql-5.5.50-linux2.6-i686.tar.gz

#mv mysql-5.5.50-linux2.6-i686 /usr/local/#cd/usr/local

#mv mysql-5.5.50-linux2.6-i686 mysql55

#cd mysql55/bin

#export PATH=/usr/local/mysql55/bin:$PATH

3)初始化实例 使用脚本mysql_install_db

#mkdir -p /tmp/mysqldata/node1

#/usr/local/mysql55/script/mysql_install_db --user=mysql --basedir=/usr/local/mysql55 --datadir=/tmp/mysqldata/node1

#cd/tmp/mysqldata/node1

出现问题1 没有libaio.so.1库

/tmp/mysql55/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

解决：查询libaio库并按照libaio.so.1

查询

linuxidc@linuxidc:/tmp$ sudo apt-cache search libaio

libaio-dev - Linux kernel AIO access library -development files

libaio1- Linux kernel AIO access library -shared library

libaio1-dbg - Linux kernel AIO access library - debugging symbols

安装

linuxidc@linuxidc:/tmp$ sudo apt-get install libaio1

初始化成功：

linuxidc@linuxidc:/usr/local/mysql/data$ ls -l /tmp/mysqldata/node1/total12drwx------ 2 linuxidc linuxidc 4096 7月 27 21:27mysql

drwx------ 2 linuxidc linuxidc 4096 7月 27 21:27performance_schema

drwx------ 2 linuxidc linuxidc 4096 7月 27 21:25 test

拷贝配置文件：support-files中拷贝my-medium.cnf

cp /usr/local/mysql56/support-files/my-medium.cnf /tmp/mysqldata

3)使用mysqld_safe脚本，启动

/usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &

问题2：没有/usr/local/mysql/data 目录

linuxidc@linuxidc:/usr/local/mysql55/support-files$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3349linuxidc@linuxidc:/usr/local/mysql55/support-files$ 160727 21:33:26 mysqld_safe Logging to '/usr/local/mysql/data/linuxidc.err'.touch: cannot touch ‘/usr/local/mysql/data/linuxidc.err’: No such fileor directorychmod: cannot access ‘/usr/local/mysql/data/linuxidc.err’: No such fileor directory160727 21:33:26 mysqld_safe The file /usr/local/mysql/bin/mysqld

does not exist or is not executable. Please cd to the mysql installation

directory and restart this script from there as follows:

./bin/mysqld_safe&See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

/usr/local/mysql55/bin/mysqld_safe: 128: /usr/local/mysql55/bin/mysqld_safe: cannot create /usr/local/mysql/data/linuxidc.err: Directory nonexistent^C

[1]+  Exit 1                  /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

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解决：创建目录并赋权

linuxidc@linuxidc:/usr/local$ sudo mkdir -p mysql/data

linuxidc@linuxidc:/usr/local/mysql$ sudo chown -R linuxidc .

linuxidc@linuxidc:/usr/local/mysql$ sudo chgrp -R linuxidc .

问题3：不存/usr/local/mysql/bin/mysqld 文件

linuxidc@linuxidc:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3773linuxidc@linuxidc:/usr/local/mysql$ 160727 21:37:32 mysqld_safe Logging to '/usr/local/mysql/data/linuxidc.err'.160727 21:37:32 mysqld_safe The file /usr/local/mysql/bin/mysqld

does not exist or is not executable. Please cd to the mysql installation

directory and restart this script from there as follows:

./bin/mysqld_safe&See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

^C

[1]+ Exit 1 /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

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怀疑 Ubuntu定死了basedir 在/usr/local/mysql 下

解决：拷贝mysql55中内容到该目录中

linuxidc@linuxidc:/usr/local/mysql$ cp -ar ../mysql55/*.

问题4：mysqld从 /usr/local/mysql/data中启动库文件；

linuxidc@linuxidc:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 3983linuxidc@linuxidc:/usr/local/mysql$ 160727 21:39:05 mysqld_safe Logging to '/usr/local/mysql/data/linuxidc.err'.160727 21:39:05 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data160727 21:39:07 mysqld_safe mysqld from pid file /usr/local/mysql/data/linuxidc.pid ended

[1]+  Done                    /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

且mysqld没有启动

linuxidc@linuxidc:~$ ps -ef | grepmysqld

linuxidc2129  2097  0 19:35 pts/2    00:00:00 grep --color=auto mysqld

查看linuxidc.err:需要的一些表不在/usr/local/mysql/data

160727 21:41:59 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data160727 21:41:59 [Note] /usr/local/mysql/bin/mysqld (mysqld 5.5.50-log) starting as process 4500...160727 21:41:59 [Note] Plugin 'FEDERATED'is disabled./usr/local/mysql/bin/mysqld: Table 'mysql.plugin' doesn't exist

160727 21:41:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

160727 21:41:59InnoDB: The InnoDB memory heap is disabled160727 21:41:59InnoDB: Mutexes and rw_locks use GCC atomic builtins160727 21:41:59 InnoDB: Compressed tables use zlib 1.2.3

160727 21:41:59InnoDB: Using Linux native AIO160727 21:41:59 InnoDB: Initializing buffer pool, size = 128.0M

160727 21:41:59InnoDB: Completed initialization of buffer pool160727 21:41:59 InnoDB: highest supported fileformat is Barracuda.

InnoDB: Log scan progressed past the checkpoint lsn48941

160727 21:41:59 InnoDB: Database was not shut down normally!InnoDB: Starting crash recovery.

InnoDB: Reading tablespace information from the .ibd files...

InnoDB: Restoring possible half-written data pages from the doublewrite

InnoDB: buffer...

InnoDB: Doing recovery: scanned up to log sequence number1595675

160727 21:41:59InnoDB: Starting an apply batch of log records to the database...

InnoDB: Progressin percents: 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99InnoDB: Apply batch completed160727 21:41:59 InnoDB: Waiting forthe background threads to start160727 21:42:00 InnoDB: 5.5.50 started; log sequence number 1595675

160727 21:42:00 [Note] Recovering after a crash using mysql-bin160727 21:42:00[Note] Starting crash recovery...160727 21:42:00[Note] Crash recovery finished.160727 21:42:00 [Note] Server hostname (bind-address): '0.0.0.0'; port: 3306

160727 21:42:00 [Note] - '0.0.0.0' resolves to '0.0.0.0';160727 21:42:00 [Note] Server socket created on IP: '0.0.0.0'.160727 21:42:00 [ERROR] Fatal error: Can't open and lock privilege tables: Table'mysql.host'doesn't exist160727 21:42:00 mysqld_safe mysqld from pid file /usr/local/mysql/data/linuxidc.pid ended

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解决：将原初始化的datadir目录中所有拷贝过去

linuxidc@linuxidc:/usr/local/mysql/data$ rm -rf test/linuxidc@linuxidc:/usr/local/mysql/data$ cp -ar /tmp/mysqldata/node1/*.

成功安装：

linuxidc@linuxidc:/usr/local/mysql/data$ ps -ef | grepmysqld

linuxidc4536 2146 0 21:43 pts/0 00:00:00 /bin/sh /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

linuxidc4773 4536 1 21:43 pts/0 00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/linuxidc.err --pid-file=/usr/local/mysql/data/linuxidc.pid --socket=/tmp/mysql.sock --port=3306linuxidc4792 2097 0 21:44 pts/2 00:00:00 grep --color=auto mysqld

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疑问：

不知是Ubuntu指定了basedir=/usr/local/mysql,datadir=/usr/local/mysql/data;还是最开始的初始化没有管用，还是有什么配置没有写在配置文件中。

当然是没有写在配置文件中了，可以查看一下my-medium.cnf内容

[client]

#password=your_password

port= 3306socket= /tmp/mysql.sock

# Here follows entriesforsome specific programs

# The MySQL server

[mysqld]

port= 3306socket= /tmp/mysql.sock

skip-external-locking

key_buffer_size=16M

max_allowed_packet=1M

table_open_cache= 64sort_buffer_size=512K

net_buffer_length=8K

read_buffer_size=256K

read_rnd_buffer_size=512K

myisam_sort_buffer_size= 8M

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没有相关目录的配置；

在my.cnf 增加一下配置

my.cnf

port= 3306socket= /tmp/mysqldata/node1/mysql.sock

[mysqld_safe]

user=linuxidc

# Here follows entriesforsome specific programs

# The MySQL server

[mysqld]

port= 3306socket= /tmp/mysqldata/node1/mysql.sock

pid-file = /tmp/mysqldata/node1/mysqld.pid

basedir= /usr/local/mysql55

datadir= /tmp/mysqldata/node1

innodb_data_home_dir= /tmp/mysqldata/node1

innodb_log_group_home_dir=/tmp/mysqldata/node1

tmpdir= /tmp/mysqldata/node1

log-error = /tmp/mysqldata/node1/linuxidc.log

log-bin = /tmp/mysqldata/node1/mysql-bin.log

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重新启动

问题一：配置文件权限太大

linuxidc@linuxidc:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &Warning: World-writable config file '/tmp/mysqldata/my.cnf' is ignored

解决：降权

linuxidc@linuxidc:sudo chmod 600 /tmp/mysqldata/my.cnf

问题二：bin目录未指定

linuxidc@linuxidc:/usr/local/mysql$ /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &

160806 16:07:29 mysqld_safe The file /usr/local/mysql/bin/mysqld does not exist or is not executable. Please cd to the mysql installation

directory and restart this script from there as follows: ./bin/mysqld_safe&

解决：在配置文件中通过ledir指定bin目录

#my.cnf增加

ledir= /usr/local/mysql55

问题三：linuxidc.err报错，插件被禁止

160806 16:48:46 [Note] Plugin 'FEDERATED'is disabled.160806 16:48:46InnoDB: The InnoDB memory heap is disabled160806 16:48:46InnoDB: Mutexes and rw_locks use GCC atomic builtins160806 16:48:46 InnoDB: Compressed tables use zlib 1.2.3

160806 16:48:46InnoDB: Using Linux native AIO160806 16:48:46 InnoDB: Initializing buffer pool, size = 128.0M

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解决：在配置文件中启用，nice=0

#my.cnf增加nice = 0

4)账号安全设置

#删除空用户

mysql -uroot --socket=/tmp/mysql.sockselectuser,host,password from mysql.user;

delete from mysql.user where user='';

delete from mysql.user where host<>'localhost';

mysql> selectuser,host,password from mysql.user;+------+-----------+----------+

| user | host | password |

+------+-----------+----------+

| root | localhost | |

+------+-----------+----------+

1 row in set (0.00 sec)

#设置root密码

mysql> set password for root@'localhost'=password('000000');

Query OK,0 rows affected (0.00 sec)

#使设置生效

flush privileges;

#删除test库

看看只读权限的test用户能用test库做什么

创建test用户

#mysql-uroot -p123456--socket=/tmp/mysql.sock

grantselect on *.* to test@'localhost' identified by '123';

使用test用户，在test库中建表

#mysql-utest -p123 --socket=/tmp/mysql.sock

use test

create table t1(id int);

mysql>show tables;+----------------+

| Tables_in_test |

+----------------+

| t1 |

+----------------+

1 row in set (0.01 sec)

删除test库

mysql>drop database test;

Query OK,1 row affected (0.01 sec)

mysql升级

从5.5升级到5.6

下载mysql5.6安装包并配置mysql5.6安装包安装路径

关闭mysql5.5的实例，修改部分参数，使用mysql5.6软件启动

执行mysql5.6路径下mysql_upgrade脚本

验证是否成功升级

MySQL升级

1)关闭mysql

查看mysql是否启动

linuxidc@linuxidc:/tmp/mysqldata$ ps -ef | grepmysqld

linuxidc4931 2146 0 22:32 pts/0 00:00:00 /bin/sh /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

linuxidc5168 4931 0 22:32 pts/0 00:00:00 /usr/local/mysql/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --log-error=/usr/local/mysql/data/linuxidc.err --pid-file=/usr/local/mysql/data/linuxidc.pid --socket=/tmp/mysql.sock --port=3306linuxidc5187 4889 0 22:33 pts/13 00:00:00 grep --color=auto mysqld

使用mysqladmin工具关闭mysql服务

linuxidc@linuxidc:/usr/local/mysql$ mysqladmin -uroot --socket=/tmp/mysql.sock shutdown -p

Enter password:160727 22:28:46 mysqld_safe mysqld from pid file /usr/local/mysql/data/linuxidc.pid ended

[1]+ Done /usr/local/mysql55/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf (wd: /usr/local/mysql/data)

(wd now:/usr/local/mysql)

检查是否关闭

linuxidc@linuxidc:/usr/local/mysql$ ps -ef | grepmysqld

linuxidc4918 2146 0 22:28 pts/0 00:00:00 grep --color=auto mysqld

2)更改my.cnf

#vim my.cnf(把55目录都改成56的)

3)使用mysql5.6启动软件；

#使用5.6拉起实例

linuxidc@linuxidc:/tmp/mysqldata$ /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf &[1] 9121linuxidc@linuxidc:/tmp/mysqldata$ 160806 21:29:11 mysqld_safe Logging to '/tmp/mysqldata/node1/linuxidc.log'.160806 21:29:11 mysqld_safe Starting mysqld daemon with databases from /tmp/mysqldata/node1

#查看mysqld进程有没有起来

linuxidc@linuxidc:/tmp/mysqldata$ ps -ef | grepmysql

linuxidc9121 8547 0 21:29 pts/2 00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

linuxidc9489 9121 0 21:29 pts/2 00:00:00 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node1 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node1/linuxidc.log --pid-file=/tmp/mysqldata/node1/mysqld.pid --socket=/tmp/mysqldata/node1/mysql.sock --port=3306linuxidc9564 8547 0 21:35 pts/2 00:00:00 grep --color=auto mysql

#登陆后查看mysql状态

mysql>status--------------mysql Ver14.14 Distrib 5.6.32, for linux-glibc2.5(x86_64) using EditLine wrapper

Connectionid: 3Current database:

Current user: root@localhost

SSL: Notinuse

Current pager: stdout

Using outfile:''Using delimiter: ;

Server version:5.6.32-log MySQL Community Server (GPL)

Protocol version:10Connection: Localhost via UNIX socket

Server characterset: latin1

Db characterset: latin1

Client characterset: utf8

Conn. characterset: utf8

UNIX socket:/tmp/mysqldata/node1/mysql.sock

Uptime:7 min 27sec

Threads:1 Questions: 5 Slow queries: 0 Opens: 32 Flush tables: 1 Open tables: 25 Queries per second avg: 0.011

--------------

4)升级库mysql_upgrade

linuxidc@linuxidc:/tmp/mysqldata$ /usr/local/mysql56/bin/mysql_upgrade -uroot --socket=/tmp/mysqldata/node1/mysql.sock -p

Enter password:

Lookingfor 'mysql' as: /usr/local/mysql56/bin/mysql

Lookingfor 'mysqlcheck' as: /usr/local/mysql56/bin/mysqlcheck

Running'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.

Running'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.

mysql.columns_priv OK

mysql.db OK

mysql.event OK

mysql.func OK

mysql.general_log OK

mysql.help_category OK

mysql.help_keyword OK

mysql.help_relation OK

mysql.help_topic OK

mysql.host OK

mysql.ndb_binlog_index OK

mysql.plugin OK

mysql.proc OK

mysql.procs_priv OK

mysql.proxies_priv OK

mysql.servers OK

mysql.slow_log OK

mysql.tables_priv OK

mysql.time_zone OK

mysql.time_zone_leap_second OK

mysql.time_zone_name OK

mysql.time_zone_transition OK

mysql.time_zone_transition_type OK

mysql.user OK

Running'mysql_fix_privilege_tables'...

Warning: Using a password on the command line interface can be insecure.

Running'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.

Running'mysqlcheck' with connection arguments: '--socket=/tmp/mysqldata/node1/mysql.sock'Warning: Using a password on the command line interface can be insecure.

OK

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#验证库有没有升级成功

linuxidc@linuxidc:/tmp/mysqldata$ /usr/local/mysql56/bin/mysql_upgrade -uroot --socket=/tmp/mysqldata/node1/mysql.sock -p

Enter password:

Lookingfor 'mysql' as: /usr/local/mysql56/bin/mysql

Lookingfor 'mysqlcheck' as: /usr/local/mysql56/bin/mysqlcheck

This installation of MySQL is already upgraded to5.6.32, use --force if you still need to run mysql_upgrade

mysql多实例安装

部署好mysql软件

编辑多个配置文件，初始化多个实例

启动mysql实例

为啥多实例部署？

充分利用系统资源

资源隔离

业务，模块隔离

多实例安装

#mkdir -p /mysqldata/node3

a) 初始化实例 使用脚本mysql_install_db

linuxidc@linuxidc:/tmp/mysqldata/node1$ /usr/local/mysql56/scripts/mysql_install_db --user=linuxidc --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node3

#查看

linuxidc@linuxidc:/tmp/mysqldata/node1$ ls ../node3

ibdata1 ib_logfile0 ib_logfile1 mysql performance_schema test

b) 给node3配置文件

cpmy2.cnf my3.cnf

vim my3.cnf(修改相关参数)

[client]

#password=your_password

port= 3308socket= /tmp/mysqldata/node3/mysql.sock

[mysqld_safe]

user=linuxidc

ledir= /usr/local/mysql56/bin

#ledir= /usr/local/mysql55/binnice = 0# Here follows entriesforsome specific programs

# The MySQL server

[mysqld]

port= 3308socket= /tmp/mysqldata/node3/mysql.sock

pid-file = /tmp/mysqldata/node3/mysqld.pid

basedir= /usr/local/mysql56

#basedir= /usr/local/mysql55

datadir= /tmp/mysqldata/node3

innodb_data_home_dir= /tmp/mysqldata/node3

innodb_log_group_home_dir= /tmp/mysqldata/node3

tmpdir= /tmp/mysqldata/node3

log-error = /tmp/mysqldata/node3/linuxidc.log

log-bin = /tmp/mysqldata/node3/mysql-bin.log

c) 使用mysqld_safe,及my3.cnf拉起实例

linuxidc@linuxidc:/tmp/mysqldata/node3$ /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/node3/my3.cnf &[2] 9861linuxidc@linuxidc:/tmp/mysqldata/node3$ 160806 22:03:17 mysqld_safe Logging to '/tmp/mysqldata/node3/linuxidc.log'.160806 22:03:17 mysqld_safe Starting mysqld daemon with databases from /tmp/mysqldata/node3

d)查看

linuxidc@linuxidc:/tmp/mysqldata/node3$ ps -ef | grepmysqld

linuxidc9121 8547 0 21:29 pts/2 00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/my.cnf

linuxidc9489 9121 0 21:29 pts/2 00:00:02 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/my.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node1 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node1/linuxidc.log --pid-file=/tmp/mysqldata/node1/mysqld.pid --socket=/tmp/mysqldata/node1/mysql.sock --port=3306linuxidc9861 8547 0 22:03 pts/2 00:00:00 /bin/sh /usr/local/mysql56/bin/mysqld_safe --defaults-file=/tmp/mysqldata/node3/my3.cnf

linuxidc10327 9861 0 22:03 pts/2 00:00:00 /usr/local/mysql56/bin/mysqld --defaults-file=/tmp/mysqldata/node3/my3.cnf --basedir=/usr/local/mysql56 --datadir=/tmp/mysqldata/node3 --plugin-dir=/usr/local/mysql56/lib/plugin --log-error=/tmp/mysqldata/node3/linuxidc.log --pid-file=/tmp/mysqldata/node3/mysqld.pid --socket=/tmp/mysqldata/node3/mysql.sock --port=3308linuxidc10350 8547 0 22:04 pts/2 00:00:00 grep --color=auto mysqld

可以看到有两个端口的mysqld，分别是3306,3308；

e) 登陆新实例，删除test库，空用户，设置root密码

linuxidc@linuxidc:/tmp/mysqldata/node3$ mysql -uroot --socket=/tmp/mysqldata/node3/mysql.sock

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connectionid is 1Server version:5.6.32-log MySQL Community Server (GPL)

Copyright (c)2000, 2016, 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 clearthe current input statement.

delete from msyql.user where user='';

delete from mysql.user where host<>'localhost';

set passwordfor root@'localhost'=password('000000');

delete from mysql.db;

drop database test;

flush privileges;

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mysql线上安装小结

根据需求选择合适的版本以及分支，建议使用或升级到较高版本5.5或5.6

如果需要定制mysql功能的话，可以考虑编译安装，否则的话建议使用二进制包安装，比较省事。

根据机器配置选择部署多个mysql实例还是单个实例，机器配置非常好的话，建议部署多实例