pt-online-schema-change 工具使用
地址：http://www.percona.com/doc/percona-toolkit/2.1/index.html
#下载：多种形式下载
wget percona.com/get/percona-toolkit.tar.gz wget percona.com/get/percona-toolkit.rpm wget percona.com/get/percona-toolkit.deb wget percona.com/get/TOOL-Name
#解决依赖
Python 2.7+版本
#安装percona-toolkit：
##Install DBI
wget http://search.cpan.org/CPAN/authors/id/T/TI/TIMB/DBI-1.625.tar.gz tar -zxvf DBI-1.625.tar.gz cd DBI-1.625 perl Makefile.PL make make install##Install DBD::Mysql
wget http://search.cpan.org/CPAN/authors/id/C/CA/CAPTTOFU/DBD-mysql-4.023.tar.gz tar -zxvf DBD-mysql-4.023.tar.gz cd DBD-mysql-4.023 perl Makefile.PL make make install##Install percona-toolkit
tar -zxvf percona-toolkit-2.2.1.tar.gz cd percona-toolkit-2.2.1 perl Makefile.PL make make install
#场景一：修改表结构
#修改前的表结构：
mysql>
show create table pt
;
CREATE TABLE `pt` (
`id` int(11) NOT NULL DEFAULT '0',
`disktype` enum('sas','shannon','memdisk') NOT NULL,
`blocksize` enum('4K','64K','256K','1M') NOT NULL,
`testmode` enum('seqwr','seqrewr','seqrd','rndrd','rndwr','rndrw') NOT NULL,
`thread` enum('1','2','4','8','16','32') NOT NULL,
`bandwidth` float(10,2) unsigned NOT NULL,
`resptime` float(10,2) unsigned NOT NULL DEFAULT '0.00',
PRIMARY KEY (`id`),
UNIQUE KEY `id_UNIQUE` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
#执行修改
[root@mysql-A luckyy]# pt-online-schema-change --alter "CHANGE resptime responsetime float(10,2) unsigned not NULL default '0'" D=test,t='pt' -- execute --print --statistics --no-check-alter
#执行结果：
Operation, tries, wait:
copy_rows, 10, 0.25
create_triggers, 10, 1
drop_triggers, 10, 1
swap_tables, 10, 1
update_foreign_keys, 10, 1
Altering `test`.`pt`...
Renaming columns:
resptime to responsetime
Creating new table...
CREATE TABLE `test`.`_pt_new` (
`id` int(11) NOT NULL DEFAULT '0',
`disktype` enum('sas','shannon','memdisk') NOT NULL,
`blocksize` enum('4K','64K','256K','1M') NOT NULL,
`testmode` enum('seqwr','seqrewr','seqrd','rndrd','rndwr','rndrw') NOT NULL,
`thread` enum('1','2','4','8','16','32') NOT NULL,
`bandwidth` float(10,2) unsigned NOT NULL,
`resptime` float(10,2) unsigned NOT NULL DEFAULT '0.00',
PRIMARY KEY (`id`),
UNIQUE KEY `id_UNIQUE` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
Created new table test._pt_new OK.
Altering new table...
ALTER TABLE `test`.`_pt_new` CHANGE resptime responsetime float(10,2) unsigned not NULL default '0'
Altered `test`.`_pt_new` OK.
2013-09-04T07:01:05 Creating triggers...
CREATE TRIGGER `pt_osc_test_pt_del` AFTER DELETE ON `test`.`pt` FOR EACH ROW DELETE IGNORE FROM `test`.`_pt_new` WHERE `test`.`_pt_new`.`id` <=> OLD.`id`
CREATE TRIGGER `pt_osc_test_pt_upd` AFTER UPDATE ON `test`.`pt` FOR EACH ROW REPLACE INTO `test`.`_pt_new` (`id`, `disktype`, `blocksize`, `testmode`, `thread`, `bandwidth`, `responsetime`) VALUES (NEW.`id`, NEW.`disktype`, NEW.`blocksize`, NEW.`testmode`, NEW.`thread`, NEW.`bandwidth`, NEW.`resptime`)
CREATE TRIGGER `pt_osc_test_pt_ins` AFTER INSERT ON `test`.`pt` FOR EACH ROW REPLACE INTO `test`.`_pt_new` (`id`, `disktype`, `blocksize`, `testmode`, `thread`, `bandwidth`, `responsetime`) VALUES (NEW.`id`, NEW.`disktype`, NEW.`blocksize`, NEW.`testmode`, NEW.`thread`, NEW.`bandwidth`, NEW.`resptime`)
2013-09-04T07:01:05 Created triggers OK.
2013-09-04T07:01:05 Copying approximately 432 rows...
INSERT LOW_PRIORITY IGNORE INTO `test`.`_pt_new` (`id`, `disktype`, `blocksize`, `testmode`, `thread`, `bandwidth`, `responsetime`) SELECT `id`, `disktype`, `blocksize`, `testmode`, `thread`, `bandwidth`, `resptime` FROM `test`.`pt` LOCK IN SHARE MODE /*pt-online-schema-change 25342 copy table*/
2013-09-04T07:01:05 Copied rows OK.
2013-09-04T07:01:05 Swapping tables...
RENAME TABLE `test`.`pt` TO `test`.`_pt_old`, `test`.`_pt_new` TO `test`.`pt`
2013-09-04T07:01:05 Swapped original and new tables OK.
2013-09-04T07:01:05 Dropping old table...
DROP TABLE IF EXISTS `test`.`_pt_old`
2013-09-04T07:01:05 Dropped old table `test`.`_pt_old` OK.
2013-09-04T07:01:05 Dropping triggers...
DROP TRIGGER IF EXISTS `test`.`pt_osc_test_pt_del`;
DROP TRIGGER IF EXISTS `test`.`pt_osc_test_pt_upd`;
DROP TRIGGER IF EXISTS `test`.`pt_osc_test_pt_ins`;
2013-09-04T07:01:05 Dropped triggers OK.
# Event Count
# ================== =====
# INSERT 1
# mysql_warning_1592 1
Successfully altered `test`.`pt`.
#修改后的表结构：
mysql>
show create table pt
;
CREATE TABLE `pt` (
`id` int(11) NOT NULL DEFAULT '0',
`disktype` enum('sas','shannon','memdisk') NOT NULL,
`blocksize` enum('4K','64K','256K','1M') NOT NULL,
`testmode` enum('seqwr','seqrewr','seqrd','rndrd','rndwr','rndrw') NOT NULL,
`thread` enum('1','2','4','8','16','32') NOT NULL,
`bandwidth` float(10,2) unsigned NOT NULL,
`responsetime` float(10,2) unsigned NOT NULL DEFAULT '0.00',
PRIMARY KEY (`id`),
UNIQUE KEY `id_UNIQUE` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
#修改后的数据查询：
mysql> select * from pt limit 10; +------+----------+-----------+----------+--------+-----------+--------------+ | id | disktype | blocksize | testmode | thread | bandwidth | responsetime | +------+----------+-----------+----------+--------+-----------+--------------+ | 1056 | shannon | 64K | seqwr | 1 | 459.61 | 0.16 | | 1058 | shannon | 64K | seqwr | 2 | 415.43 | 0.32 | | 1060 | shannon | 64K | seqwr | 4 | 417.14 | 1.73 | | 1062 | shannon | 64K | seqwr | 8 | 408.06 | 5.86 | | 1064 | shannon | 64K | seqwr | 16 | 385.12 | 12.57 | | 1066 | shannon | 64K | seqwr | 32 | 381.26 | 25.74 | | 1068 | shannon | 256K | seqwr | 1 | 650.01 | 0.43 | | 1070 | shannon | 256K | seqwr | 2 | 681.42 | 0.81 | | 1072 | shannon | 256K | seqwr | 4 | 732.52 | 3.65 | | 1074 | shannon | 256K | seqwr | 8 | 674.30 | 11.79 | +------+----------+-----------+----------+--------+-----------+--------------+ 10 rows in set (0.00 sec)
#场景二：增加列
#执行修改 增加
[root@mysql-A luckyy]# pt-online-schema-change --alter "add p1 float(10,2) not NULL default '0'" D=test,t='pt' --execute --print --statistics --no-check-alter
#修改后的表结构：
mysql>
show create table pt
;
CREATE TABLE `pt` (
`id` int(11) NOT NULL DEFAULT '0',
`disktype` enum('sas','shannon','memdisk') NOT NULL,
`blocksize` enum('4K','64K','256K','1M') NOT NULL,
`testmode` enum('seqwr','seqrewr','seqrd','rndrd','rndwr','rndrw') NOT NULL,
`thread` enum('1','2','4','8','16','32') NOT NULL,
`bandwidth` float(10,2) unsigned NOT NULL,
`responsetime` float(10,2) unsigned NOT NULL DEFAULT '0.00',
`p1` float(10,2) NOT NULL DEFAULT '0.00',
PRIMARY KEY (`id`),
UNIQUE KEY `id_UNIQUE` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
#修改后的数据查询：
mysql> select * from pt limit 10; +------+----------+-----------+----------+--------+-----------+--------------+------+ | id | disktype | blocksize | testmode | thread | bandwidth | responsetime | p1 | +------+----------+-----------+----------+--------+-----------+--------------+------+ | 1056 | shannon | 64K | seqwr | 1 | 459.61 | 0.16 | 0.00 | | 1058 | shannon | 64K | seqwr | 2 | 415.43 | 0.32 | 0.00 | | 1060 | shannon | 64K | seqwr | 4 | 417.14 | 1.73 | 0.00 | | 1062 | shannon | 64K | seqwr | 8 | 408.06 | 5.86 | 0.00 | | 1064 | shannon | 64K | seqwr | 16 | 385.12 | 12.57 | 0.00 | | 1066 | shannon | 64K | seqwr | 32 | 381.26 | 25.74 | 0.00 | | 1068 | shannon | 256K | seqwr | 1 | 650.01 | 0.43 | 0.00 | | 1070 | shannon | 256K | seqwr | 2 | 681.42 | 0.81 | 0.00 | | 1072 | shannon | 256K | seqwr | 4 | 732.52 | 3.65 | 0.00 | | 1074 | shannon | 256K | seqwr | 8 | 674.30 | 11.79 | 0.00 | +------+----------+-----------+----------+--------+-----------+--------------+------+ 10 rows in set (0.00 sec)
#场景三：删除列
#执行修改 删除
[root@mysql-A luckyy]# pt-online-schema-change --alter "drop p1" D=test,t='pt' --execute --print --statistics --no-check-alter
#修改后的表结构：
mysql>
show create table pt
;
CREATE TABLE `pt` (
`id` int(11) NOT NULL DEFAULT '0',
`disktype` enum('sas','shannon','memdisk') NOT NULL,
`blocksize` enum('4K','64K','256K','1M') NOT NULL,
`testmode` enum('seqwr','seqrewr','seqrd','rndrd','rndwr','rndrw') NOT NULL,
`thread` enum('1','2','4','8','16','32') NOT NULL,
`bandwidth` float(10,2) unsigned NOT NULL,
`responsetime` float(10,2) unsigned NOT NULL DEFAULT '0.00',
PRIMARY KEY (`id`),
UNIQUE KEY `id_UNIQUE` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
工具集地址：
http://www.percona.com/doc/percona-toolkit/2.1/index.html
工具地址：
http://www.percona.com/doc/percona-toolkit/2.1/pt-online-schema-change.html