这篇文章主要介绍MySQL如何在线安装其它引擎，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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需要在现有mysql中安装sphinx的存储引擎，要保证现有mysql运行的情况下完成。mysql也的确支持存储引擎的在线热插拔，下面介绍安装步骤：
1、查看现有mysql的运行版本
[root@localhost plugin]# mysqladmin -uroot -proot version
Warning: Using a password on the command line interface can be insecure.
mysqladmin Ver 8.42 Distrib 5.6.16, for Linux on x86_64
Copyright (c) 2000, 2014, 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.
Server version 5.6.16
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /var/lib/mysql/mysql.sock
Uptime: 1 day 6 hours 26 min 58 sec
Threads: 1 Questions: 35 Slow queries: 0 Opens: 67 Flush tables: 1 Open tables: 60 Queries per second avg: 0.000
2、下载mysql和sphinx
mysql：wget http://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.16.tar.gz
sphinx：http://sphinxsearch.com/downloads/release/ 进去后下载：
| Sphinx 2.1.7-release (r4638; Mar 30, 2014) | ||||
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| Source tarball (tar.gz) | 2.1.7-release | 2.3M | Download |
注意：mysql源码包的版本一定要与当前运行的mysql版本一致！
解压
# tar -xzvf mysql-5.6.16.tar.gz
# tar -xzvf sphinx-2.1.7-release.tar.gz
3、将sphinx-2.1.7-release下的mysqlse目录复制到mysql目录中
#cp -r sphinx-2.1.7-release/mysqlse/ mysql-5.6.16/storage/sphinx
build
# cd mysql-5.6.16
# sh BUILD/autorun.sh
#./configure （此步可以需要yum一些依赖的软件包，否则会有错误或警告）
# make
注意：这里到make这步即可，不用install
4、将make好的文件复制到当前运行的mysql目录中
[root@localhost sphinx]# pwd
/u/opt/mysql-5.6.16/storage/sphinx
cp ha_sphinx.so /usr/lib64/mysql/plugin/
更改所有者（这边试不改也可以）
# chown mysql.mysql /usr/lib64/mysql/plugin/*
注：我当前运行的mysql目录在/usr/local/mysql
5、登陆mysql加载sphinx引擎模块
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| CSV | YES | CSV storage engine | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.01 sec)
mysql> INSTALL PLUGIN sphinx SONAME 'ha_sphinx.so';
ERROR 1126 (HY000): Can't open shared library '/usr/lib64/mysql/plugin/ha_sphinx.so' (errno: 2 /usr/lib64/mysql/plugin/ha_sphinx.so: cannot open shared object file: No such file or directory)
这里ERROR发现第一次是ha_sphinx.so位置拷错了，拷正确后：
mysql> INSTALL PLUGIN sphinx SONAME 'ha_sphinx.so';
Query OK, 0 rows affected (0.05 sec)
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| CSV | YES | CSV storage engine | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| SPHINX | YES | Sphinx storage engine 2.1.7-release | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
10 rows in set (0.00 sec)
mysql>
安装完成！如果要卸载存储模块使用
mysql> UNINSTALL PLUGIN sphinx;
安装好后,过了几天:
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| CSV | YES | CSV storage engine | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)
mysql>
不知道为什么找不到 SPHINX 引擎
只有重新安装一遍看,于是参考网上的:
mysql> INSTALL PLUGIN sphinx SONAME 'ha_sphinx.so';
ERROR 1062 (23000): Duplicate entry 'sphinx' for key 'PRIMARY'
mysql>
mysql> UNINSTALL PLUGIN sphinx;
ERROR 1305 (42000): PLUGIN sphinx does not exist
mysql>
mysql>
mysql> select * from mysql.plugin;
+--------+--------------+
| name | dl |
+--------+--------------+
| sphinx | ha_sphinx.so |
+--------+--------------+
1 row in set (0.00 sec)
mysql> UNINSTALL PLUGIN sphinx;
ERROR 1305 (42000): PLUGIN sphinx does not exist
mysql>
mysql>
mysql> select * from mysql.plugin;
+--------+--------------+
| name | dl |
+--------+--------------+
| sphinx | ha_sphinx.so |
+--------+--------------+
1 row in set (0.00 sec)
mysql>
mysql> delete from mysql.plugin where name='SPHINX';
Query OK, 1 row affected (0.02 sec)
mysql>
mysql>
mysql> select * from mysql.plugin;
Empty set (0.00 sec)
mysql> install plugin SPHINX soname 'ha_sphinx.so';
Query OK, 0 rows affected (0.00 sec)
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| CSV | YES | CSV storage engine | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| SPHINX | YES | Sphinx storage engine 2.1.7-release | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
10 rows in set (0.00 sec)
mysql>
在开始安装之前,查检一下mysql.plugin表,里边是不是留有老版本的SPHINXSE没有完全清理掉.
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