pt-archiver工具其實就是用來清理，歸檔資料用的
下面列舉了三種常用的功能

1,只清理資料
mysql> use sb
Database changed

mysql> select * from sb2;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
| 5 | e |
| 6 | f |
| 7 | h |
+----+------+

mysql> alter table sb2 add primary key (id);
Query OK, 0 rows affected (0.13 sec)
Records: 0 Duplicates: 0 Warnings: 0

把sb庫裡sb2表的資料，id >=5的資料清除
[root@goolen goolen]# pt-archiver --source h=192.168.100.50,D=sb,t=sb2 --user=root --password=root --where 'id>=5' --purge --limit=1 --no-check-charset

執行完後
觀察日誌輸出：
141128 11:47:52 8 Connect root@192.168.100.50 on sb
8 Query set autocommit=0
8 Query SELECT @@SQL_MODE
8 Query SHOW VARIABLES LIKE 'wait\_timeout'
8 Query SET SESSION wait_timeout=10000
8 Query SET @@SQL_QUOTE_SHOW_CREATE = 1/*!40101, @@SQL_MODE='NO_AUTO_VALUE_ON_ZERO'*/
8 Query SHOW VARIABLES LIKE 'version%'
8 Query SHOW ENGINES
8 Query SHOW VARIABLES LIKE 'innodb_version'
8 Query show variables like 'innodb_rollback_on_timeout'
8 Query /*!40101 SET @OLD_SQL_MODE := @@SQL_MODE, @@SQL_MODE := '', @OLD_QUOTE := @@SQL_QUOTE_SHOW_CREATE, @@SQL_QUOTE_SHOW_CREATE := 1 */
8 Query USE `sb`
8 Query SHOW CREATE TABLE `sb`.`sb2`
8 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */
8 Query SHOW VARIABLES LIKE 'version%'
8 Query SHOW ENGINES
8 Query SHOW VARIABLES LIKE 'innodb_version'
8 Query SELECT CONCAT(@@hostname, @@port)
8 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (id>=5) ORDER BY `id` LIMIT 1
8 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '5')
8 Query commit
8 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (id>=5) AND ((`id` >= '5')) ORDER BY `id` LIMIT 1
8 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '6')
8 Query commit
8 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (id>=5) AND ((`id` >= '6')) ORDER BY `id` LIMIT 1
8 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '7')
8 Query commit
8 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (id>=5) AND ((`id` >= '7')) ORDER BY `id` LIMIT 1
8 Query commit
8 Quit
141128 11:47:53 1 Query SELECT 1 As Value
141128 11:47:56 1 Query SELECT 1 As Value

查一下源表資料，id >=5 的資料已經從源表刪除了
mysql> select * from sb2;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
+----+------+

引數說明：
--purge 清理資料，直接刪除源表裡的資料，謹慎使用；
--where 指定刪除條件，必須的條件，有字串的，要用引號括起來
--limit 表示一次要刪除多少行資料，這裡設定為1，表示一次只刪除一行，根據說明的日誌跟蹤可以看出來，id>=5的有三條資料，分三次刪除，每次只刪除一條資料

2，只把資料匯出到外部檔案，但是不刪除源表裡的資料：
mysql> select * from sb2;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
+----+------+
4 rows in set (0.00 sec)

[root@goolen goolen]# pt-archiver --source h=192.168.100.50,D=sb,t=sb2 --user=root --password=root --where '1=1' --no-check-charset --no-delete --file="/tmp/archiver.dat"
[root@goolen goolen]# cat /tmp/archiver.dat
1 a
2 b
3 c
4 d

檢視源表資料，由於加了--no-delete引數，源表資料還在
mysql> select * from sb2;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
+----+------+
4 rows in set (0.00 sec)

檢視查詢日誌輸出：
9 Query USE `sb`
9 Query SHOW CREATE TABLE `sb`.`sb2`
9 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */
9 Query SHOW VARIABLES LIKE 'version%'
9 Query SHOW ENGINES
9 Query SHOW VARIABLES LIKE 'innodb_version'
9 Query SELECT CONCAT(@@hostname, @@port)
9 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) ORDER BY `id` LIMIT 1
9 Query commit
9 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` > '1')) ORDER BY `id` LIMIT 1
9 Query commit
9 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` > '2')) ORDER BY `id` LIMIT 1
9 Query commit
9 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` > '3')) ORDER BY `id` LIMIT 1
9 Query commit
9 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` > '4')) ORDER BY `id` LIMIT 1
9 Query commit

引數說明：
--no-delete 表示不刪除源表裡的資料；
--file 指定資料要匯出到哪個檔案；

3，把資料歸檔到其他表（支援遠端歸檔）
mysql> select * from sb2;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
+----+------+
4 rows in set (0.00 sec)

[root@goolen goolen]# pt-archiver --source h=192.168.100.50,D=sb,t=sb2,u=root,p=root --dest h=192.168.100.92,D=goolen,t=sb250,u=root,p=root --where '1=1' --no-check-charset

檢視源表資料，由於未加--no-delete引數，源表資料清除了
mysql> select * from sb2;
Empty set (0.00 sec)

檢視目標資料庫裡的表，資料已經成功歸檔過來
mysql> select * from sb250;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 2 | b |
| 3 | c |
| 4 | d |
+----+------+
4 rows in set (0.00 sec)

檢視查詢日誌：
10 Query USE `sb`
10 Query SHOW CREATE TABLE `sb`.`sb2`
10 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */
10 Query SHOW VARIABLES LIKE 'version%'
10 Query SHOW ENGINES
10 Query SHOW VARIABLES LIKE 'innodb_version'
10 Query SELECT CONCAT(@@hostname, @@port)
10 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) ORDER BY `id` LIMIT 1
10 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '1')
10 Query commit
10 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` >= '1')) ORDER BY `id` LIMIT 1
10 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '2')
10 Query commit
10 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` >= '2')) ORDER BY `id` LIMIT 1
10 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '3')
10 Query commit
10 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` >= '3')) ORDER BY `id` LIMIT 1
10 Query DELETE FROM `sb`.`sb2` WHERE (`id` = '4')
10 Query commit
10 Query SELECT /*!40001 SQL_NO_CACHE */ `id`,`name` FROM `sb`.`sb2` FORCE INDEX(`PRIMARY`) WHERE (1=1) AND ((`id` >= '4')) ORDER BY `id` LIMIT 1
10 Query commit

引數說明：
--dest 指定遠端資料庫資訊
--no-delete 如果不指定次引數，當資料歸檔到遠端庫後，會刪除源表的資料，使用時需要注意

pt-archiver工具的使用

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