怎么实现MyISAM分区表迁移及合并

这期内容当中小编将会给大家带来有关怎么实现MyISAM分区表迁移及合并，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

dyn_change_yyyymm 是一张按照日期(字段time_d)分区的表(myisam)，只有insert，select操作。

2016年3月份起结构如下：

CREATE TABLE `dyn_change_201603` (

  `time_d` int(8) NOT NULL COMMENT 帐期,

  `id` char(32) NOT NULL COMMENT 业务标识,

`content` text COMMENT 内容,

  `create_time` int(11) NOT NULL COMMENT 时间,

  KEY `idx_id` (`id`),

KEY `idx_create_time` (`create_time`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT=动态数据记录表

/*!50100 PARTITION BY RANGE (time_d)

(PARTITION dypt_20160301 VALUES LESS THAN (20160302) ENGINE = MyISAM,

PARTITION dypt_20160302 VALUES LESS THAN (20160303) ENGINE = MyISAM,

 PARTITION dypt_20160303 VALUES LESS THAN (20160304) ENGINE = MyISAM,

PARTITION dypt_20160304 VALUES LESS THAN (20160305) ENGINE = MyISAM,

PARTITION dypt_20160305 VALUES LESS THAN (20160306) ENGINE = MyISAM,

PARTITION dypt_20160306 VALUES LESS THAN (20160307) ENGINE = MyISAM,

 PARTITION dypt_20160307 VALUES LESS THAN (20160308) ENGINE = MyISAM,

PARTITION dypt_20160308 VALUES LESS THAN (20160309) ENGINE = MyISAM,

PARTITION dypt_20160309 VALUES LESS THAN (20160310) ENGINE = MyISAM,

 PARTITION dypt_20160310 VALUES LESS THAN (20160311) ENGINE = MyISAM,

PARTITION dypt_20160311 VALUES LESS THAN (20160312) ENGINE = MyISAM,

PARTITION dypt_20160312 VALUES LESS THAN (20160313) ENGINE = MyISAM,

 PARTITION dypt_20160313 VALUES LESS THAN (20160314) ENGINE = MyISAM,

PARTITION dypt_20160314 VALUES LESS THAN (20160315) ENGINE = MyISAM,

PARTITION dypt_20160315 VALUES LESS THAN (20160316) ENGINE = MyISAM,

 PARTITION dypt_20160316 VALUES LESS THAN (20160317) ENGINE = MyISAM,

PARTITION dypt_20160317 VALUES LESS THAN (20160318) ENGINE = MyISAM,

PARTITION dypt_20160318 VALUES LESS THAN (20160319) ENGINE = MyISAM,

 PARTITION dypt_20160319 VALUES LESS THAN (20160320) ENGINE = MyISAM,

PARTITION dypt_20160320 VALUES LESS THAN (20160321) ENGINE = MyISAM,

PARTITION dypt_20160321 VALUES LESS THAN (20160322) ENGINE = MyISAM,

 PARTITION dypt_20160322 VALUES LESS THAN (20160323) ENGINE = MyISAM,

PARTITION dypt_20160323 VALUES LESS THAN (20160324) ENGINE = MyISAM,

PARTITION dypt_20160324 VALUES LESS THAN (20160325) ENGINE = MyISAM,

 PARTITION dypt_20160325 VALUES LESS THAN (20160326) ENGINE = MyISAM,

PARTITION dypt_20160326 VALUES LESS THAN (20160327) ENGINE = MyISAM,

PARTITION dypt_20160327 VALUES LESS THAN (20160328) ENGINE = MyISAM,

 PARTITION dypt_20160328 VALUES LESS THAN (20160329) ENGINE = MyISAM,

PARTITION dypt_20160329 VALUES LESS THAN (20160330) ENGINE = MyISAM,

PARTITION dypt_20160330 VALUES LESS THAN (20160331) ENGINE = MyISAM,

PARTITION dypt_20160331 VALUES LESS THAN (20160401) ENGINE = MyISAM) */

在不影响insert的情况下，需要将dyn_change_201603迁移到新环境下。

步骤如下：

1）假设当前日期为：2016年3月30日，对应分区dypt_20160330，新环境创建dyn_change_201603表（非分区表）。insert 操作可以移到新环境下；

2）将老环境下的表dyn_change_201603 重命名为： dyn_change_201603_old；

3）到mysql的数据目录下，将dyn_change_201603_old的数据文件&&索引文件scp到新环境对应的路径下面。[注：dyn_change_201603_old此时的对应数据&&索引文件不同与dyn_change_201603的数据&&索引文件

]

4）然后交换dyn_change_201603，dyn_change_201603_old表名。交换后，90%以上的数据都在dyn_change_201603表，而少部分数据在dyn_change_201603_old（只在分区dypt_20160330 中）；

    dyn_change_201603接受当前insert操作；

5）然后导出dyn_change_201603_old 的dypt_20160330分区的数据（仅有少量数据），可以导出dyn_change_201603_30.csv文件；

6）然后将dyn_change_201603_30.csv的数据导入dyn_change_201603；

7）alter table dyn_change_201603 analyze partition dypt_20160330。

[注：此时可在insert操作较少的时间 or 暂停insert 操作]。

迁移合并完成。

上述就是小编为大家分享的怎么实现MyISAM分区表迁移及合并了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注行业资讯频道。