mysql binlog 恢複指定表資料
一、登入資料庫重新整理binlog
1.1)檢視目前的binlog
MySQL> show master status;
+---------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------------+----------+--------------+------------------+-------------------+
| test-150-bin.000003 | 2895377 | | | |
+---------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
1.2)重新整理binlog
mysql> flush logs;
Query OK, 0 rows affected (0.01 sec)
1.3)确認重新整理binlog成功
mysql> show master status;
+---------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------------+----------+--------------+------------------+-------------------+
| test-150-bin.000004 | 120 | | | |
+---------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
用show master status 指令檢視目前的binlog已經由test-150-bin.000003變為test-150-bin.000004,
證明binlog已經重新整理成功。
二、查詢二進制日志位置
mysql> show variables like'log_bin%';
+---------------------------------+------------------------------------------+
| Variable_name | Value |
+---------------------------------+------------------------------------------+
| log_bin | ON |
| log_bin_basename | /db/mysql5.6/data/test-150-bin |
| log_bin_index | /db/mysql5.6/data/test-150-bin.index |
| log_bin_trust_function_creators | ON |
| log_bin_use_v1_row_events | OFF |
+---------------------------------+------------------------------------------+
三、從二進制日志中擷取表被删除的pos:
mysqlbinlog /log/binlog_3308/bin.000012 -d jz_seckill | grep --ignore-case DROP -A3 -B4
----------------------------------------------------
# at 775995049
#160720 9:37:57 server id 18500 end_log_pos 775995186 Query thread_id=249201 exec_time=0 error_code=0
SET TIMESTAMP=1468978677;
SET @@session.foreign_key_checks=1;
DROP TABLE `t_sec_praise_record_copy`
;
# at 775995186
#160720 9:37:58 server id 18500 end_log_pos 775995224 GTID 0-18500-5952648
----------------------------------------------------
775995049這個開始drop的。
四、從binlog中擷取指定資料庫的改變資料
用mysqlbinlog 恢複ivr資料庫在二進制日志test-150-bin.000003中的資料
這裡假設從上一次mysql備份後,隻有一個binlog産生:bin.000012
/usr/local/mysql_3308/bin/mysqlbinlog -d jz_seckill --stop-position=775995049 /log/binlog_3308/bin.000012 >/tmp/seckill.sql
如果從上次備份重新整理binlog,到發現表被删掉的過程中産生了多個binlog。則要按照binlog産生的順序,那
麼恢複的次序應該是按照binglog的産生的序号,從小到大依次恢複。
假如從上次備份,到發現表被删除,共有兩個binlog檔案,分别是test-150-bin.000002,test-150-bin.000003 ,
則按照binlog序号從小到大的排列,恢複的順序應該是:
mysqlbinlog -d jz_seckill /log/binlog_3308/bin.000011 >/tmp/seckill.sql
mysqlbinlog -d jz_seckill --stop-position=775995049 /log/binlog_3308/bin.000011 >>/tmp/seckill.sql
由于恢複的檔案seckill.sql中包含了整個seckill資料庫的所有表,我們隻要恢複指定的表,還要對恢複出來的sql進行過濾。
[[email protected] data]$ more recover_ivr.sql |grep --ignore-case -E 'insert|update|delete' -A2 -B2|grep testtuo
;
;
;
DELIMITER ;
--
# at 122721
#140126 17:03:28 server id 150 end_log_pos 122721 CRC32 0xe0f851bb Intvar
SET INSERT_ID=4;
#140126 17:03:28 server id 150 end_log_pos 122838 CRC32 0x9efcc7b2 Query thread_id=12578 exec_time=0 error_code=0
use `ivr`;
SET TIMESTAMP=1390727008;
INSERT INTO `testtuo` (`name`) VALUES ('d')
;
# at 122838
将過濾後的結果儲存為sql腳本,恢複到資料庫即可。
如果單獨恢複單獨一個庫,則可以使用:
(2)你可以通過–one-database 參數選擇性的恢複單個資料庫:
mysqlbinlog --stop-date='2005-04-20 9:59:59' /var/log/mysql/mysql-bin.000001 | mysql -u root -pmypwd –one-database db_test
mysqlbinlog --stop-date='2005-04-20 9:59:59' /var/log/mysql/mysql-bin.000001 | mysql -u root -pmypwd –one-database db_test