FEDERATED存储引擎的使用，如何开启FEDERATED，FEDERATED Support NO?

开启FEDERATED存储的方法如下：

1.查看是否安装了federated引擎

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mysql> show engines;

+————+———+————————————————————+————–+——+————+

| Engine | Support | Comment | Transactions | XA | Savepoints |

+————+———+————————————————————+————–+——+————+

| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |

| CSV | YES | CSV storage engine | NO | NO | NO |

| MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO |

| InnoDB | YES | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |

| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |

+————+———+————————————————————+————–+——+————+

5 rows in set (0.00 sec)

从中可以看出federated引擎没有开启.

2.开启federated引擎

vi /etc/my.cnf

在[mysqld]之后添加：

federated

3.安装federated存储引擎

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mysql> install plugin federated soname ‘ha_federated.so’;

Query OK, 0 rows affected, 1 warning (0.07 sec)

4.查看是否安装了federated引擎

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mysql> show engines;

+————+———+————————————————————+————–+——+————+

| Engine | Support | Comment | Transactions | XA | Savepoints |

+————+———+————————————————————+————–+——+————+

| FEDERATED | YES | Federated MySQL storage engine | NO | NO | NO |

| CSV | YES | CSV storage engine | NO | NO | NO |

| MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO |

| InnoDB | YES | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |

| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |

| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |

+————+———+————————————————————+————–+——+————+

6 rows in set (0.00 sec)

5.创建表语句：

使用FEDERATED建表语句如下：

CREATE TABLE (……) ENGINE =FEDERATED CONNECTION=’mysql://[name]:[pass]@[location]:[port]/[db-name]/[table-name]’