pt-osc测试

Posted 2021-02-14 sgphappy2007

 

pt-online-schema-change安装见pt-toolkit，这里不作介绍：

 

 

ddl语名：

alter table TXP.T_TXP_ORDER modify column merchant_orderno VARCHAR(50) COMMENT ‘商户订单号‘;

 

[[email protected] ~]# pt-online-schema-change -h127.0.0.1 -uroot -proot -P3306 --alter="modify column merchant_orderno VARCHAR(50) COMMENT ‘商户订单号‘" --execute D=txp,t=t_txp_order;

Cannot connect to D=txp,P=3306,h=192.168.9.242,p=...,u=root

No slaves found. See --recursion-method if host sjnonbdb1 has slaves.

Not checking slave lag because no slaves were found and --check-slave-lag was not specified.

Operation, tries, wait:

analyze_table, 10, 1

copy_rows, 10, 0.25

create_triggers, 10, 1

drop_triggers, 10, 1

swap_tables, 10, 1

update_foreign_keys, 10, 1

Altering `txp`.`t_txp_order`...

Creating new table...

Created new table txp._t_txp_order_new OK.

Altering new table...

Altered `txp`.`_t_txp_order_new` OK.

2016-12-05T15:19:52 Creating triggers...

2016-12-05T15:19:52 Created triggers OK.

2016-12-05T15:19:52 Copying approximately 1067052 rows...

Copying `txp`.`t_txp_order`: 40% 00:43 remain

Copying `txp`.`t_txp_order`: 79% 00:15 remain

2016-12-05T15:21:06 Copied rows OK.

2016-12-05T15:21:06 Analyzing new table...

2016-12-05T15:21:06 Swapping tables...

2016-12-05T15:21:06 Swapped original and new tables OK.

2016-12-05T15:21:06 Dropping old table...

2016-12-05T15:21:08 Dropped old table `txp`.`_t_txp_order_old` OK.

2016-12-05T15:21:08 Dropping triggers...

2016-12-05T15:21:08 Dropped triggers OK.

Successfully altered `txp`.`t_txp_order`.

 

 

 

 

要作的操作：alter table t2 add column class  varchar(10);

 

在osc过程中是可以以表作dml操作的

 

 

注意：

 

t2表要有主键；

 

 

pt-online-schema-change --socket=/tmp/mysql3306.sock  --alter="add column card  varchar(255) not null default ‘‘ " --execute D=test,t=t2;

 

No slaves found.  See --recursion-method if host sdw3 has slaves.

Not checking slave lag because no slaves were found and --check-slave-lag was not specified.

Operation, tries, wait:

  analyze_table, 10, 1

  copy_rows, 10, 0.25

  create_triggers, 10, 1

  drop_triggers, 10, 1

  swap_tables, 10, 1

  update_foreign_keys, 10, 1

Altering `test`.`t2`...

Creating new table...

Created new table test._t2_new OK.

Altering new table...

Altered `test`.`_t2_new` OK.

2016-04-18T17:46:25 Creating triggers...

2016-04-18T17:46:25 Created triggers OK.

2016-04-18T17:46:25 Copying approximately 16327638 rows...

Copying `test`.`t2`:  12% 03:35 remain

Copying `test`.`t2`:  24% 03:02 remain

Copying `test`.`t2`:  38% 02:26 remain

Copying `test`.`t2`:  51% 01:51 remain

Copying `test`.`t2`:  65% 01:19 remain

Copying `test`.`t2`:  78% 00:48 remain

Copying `test`.`t2`:  92% 00:17 remain

2016-04-18T17:50:18 Copied rows OK.

2016-04-18T17:50:18 Analyzing new table...

2016-04-18T17:50:18 Swapping tables...

2016-04-18T17:50:18 Swapped original and new tables OK.

2016-04-18T17:50:18 Dropping old table...

2016-04-18T17:50:18 Dropped old table `test`.`_t2_old` OK.

2016-04-18T17:50:18 Dropping triggers...

2016-04-18T17:50:18 Dropped triggers OK.

Successfully altered `test`.`t2`.

[[email protected] mysql]# 

 

创建的触发器：

 

/*!50003 CREATE*/ /*!50017 DEFINER=`root`@`localhost`*/ /*!50003 TRIGGER `pt_osc_test_t2_ins` AFTER INSERT ON `test`.`t2` FOR EACH ROW REPLACE INTO `test`.`_t2_new` (`a`, `b`, `class`, `student`, `stud`) VALUES (NEW.`a`, NEW.`b`, NEW.`class`, NEW.`student`, NEW.`stud`) */;;

/*!50003 CREATE*/ /*!50017 DEFINER=`root`@`localhost`*/ /*!50003 TRIGGER `pt_osc_test_t2_upd` AFTER UPDATE ON `test`.`t2` FOR EACH ROW REPLACE INTO `test`.`_t2_new` (`a`, `b`, `class`, `student`, `stud`) VALUES (NEW.`a`, NEW.`b`, NEW.`class`, NEW.`student`, NEW.`stud`) */;;

/*!50003 CREATE*/ /*!50017 DEFINER=`root`@`localhost`*/ /*!50003 TRIGGER `pt_osc_test_t2_del` AFTER DELETE ON `test`.`t2` FOR EACH ROW DELETE IGNORE FROM `test`.`_t2_new` WHERE `test`.`_t2_new`.`a` <=> OLD.`a` */;;