MyFlash闪回初体验(续)
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2022-05-13 21:40:29
last night,i've tested flashback by MyFlash tool,but failed,now let's do some other test with it.first of all,clear the test environment:drop the proc ......
last night,i've tested flashback by MyFlash tool,but failed,now let's do some other test with it.first of all,clear the test environment:drop the procedure and table created yesterday.
1 root@localhost:mysql3306.sock [(none)]09:14:31>show procedure status where db='zlm';
2 +-----+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
3 | Db | Name | Type | Definer | Modified | Created | Security_type | Comment | character_set_client | collation_connection | Database Collation |
4 +-----+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
5 | zlm | pro_flashbk | PROCEDURE | root@localhost | 2018-06-03 08:46:54 | 2018-06-03 08:46:54 | DEFINER | | utf8 | utf8_general_ci | utf8_general_ci |
6 +-----+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
7 1 row in set (0.07 sec)
8
9 root@localhost:mysql3306.sock [(none)]09:14:47>show tables from zlm;
10 +---------------+
11 | Tables_in_zlm |
12 +---------------+
13 | t1 |
14 | t2 |
15 | t3 |
16 | test_flashbk |
17 +---------------+
18 4 rows in set (0.00 sec)
19
20 root@localhost:mysql3306.sock [(none)]09:14:52>drop procedure pro_flashbk;
21 ERROR 1046 (3D000): No database selected
22 root@localhost:mysql3306.sock [(none)]09:15:08>use zlm;
23 Reading table information for completion of table and column names
24 You can turn off this feature to get a quicker startup with -A
25
26 Database changed
27 root@localhost:mysql3306.sock [zlm]09:15:12>drop procedure pro_flashbk;
28 Query OK, 0 rows affected (0.02 sec)
29
30 root@localhost:mysql3306.sock [zlm]09:15:20>drop table test_flashbk;
31 Query OK, 0 rows affected (0.23 sec)
32
33 root@localhost:mysql3306.sock [zlm]09:15:29>delimiter //
34 root@localhost:mysql3306.sock [zlm]09:15:44>create procedure pro_flashbk()
35 -> begin
36 -> declare id int;
37 -> set id = 100000;
38 -> while id>0 do
39 -> insert into test_flashbk(name) values ('aaron8219');
40 -> set id=id-1;
41 -> end while;
42 -> end //
43 Query OK, 0 rows affected (0.00 sec)
44
45 root@localhost:mysql3306.sock [zlm]09:15:44>delimiter ;
46 root@localhost:mysql3306.sock [zlm]09:15:45>create table test_flashbk(
47 -> id bigint not null auto_increment,
48 -> name varchar(20) not null default '',
49 -> primary key(id)
50 -> ) engine=innodb default charset=utf8mb4;
51 Query OK, 0 rows affected (0.08 sec)
52
53 root@localhost:mysql3306.sock [zlm]09:16:05>call pro_flashbk();
54 Query OK, 1 row affected (14.77 sec)
55
56 root@localhost:mysql3306.sock [zlm]09:16:29>select count(*) from test_flashbk;
57 +----------+
58 | count(*) |
59 +----------+
60 | 100000 |
61 +----------+
62 1 row in set (0.04 sec)
63
64 root@localhost:mysql3306.sock [zlm]09:16:54>checksum table test_flashbk;
65 +------------------+------------+
66 | Table | Checksum |
67 +------------------+------------+
68 | zlm.test_flashbk | 1638389274 |
69 +------------------+------------+
70 1 row in set (0.06 sec)
71
72 root@localhost:mysql3306.sock [zlm]09:17:05>show binary logs;
73 +------------------+-----------+
74 | Log_name | File_size |
75 +------------------+-----------+
76 | mysql-bin.000013 | 217 |
77 | mysql-bin.000014 | 1341 |
78 | mysql-bin.000015 | 217 |
79 | mysql-bin.000016 | 680 |
80 | mysql-bin.000017 | 268435617 |
81 | mysql-bin.000018 | 72724171 |
82 | mysql-bin.000019 | 241 |
83 | mysql-bin.000020 | 11019314 |
84 | mysql-bin.000021 | 241 |
85 | mysql-bin.000022 | 1305983 |
86 | mysql-bin.000023 | 268435590 |
87 | mysql-bin.000024 | 9566499 |
88 | mysql-bin.000025 | 19081875 |
89
90
91 | mysql-bin.000026 | 27801320 |
92 +------------------+-----------+
93 14 rows in set (0.00 sec)
in order to make sure what binary log i need to generate the flashback file,i use "flush binary logs" and "show binary logs" to mark the explicit binary log(here is the mysql-bin.000027).
after that,i do the deletion operation by intentionally forget to use where clause,obviously all the records in the test table "test_flashbk" will be deleted in the end as below:
1 root@localhost:mysql3306.sock [zlm]09:17:53>flush binary logs; 2 Query OK, 0 rows affected (0.11 sec) 3 4 root@localhost:mysql3306.sock [zlm]09:18:06>show binary logs; 5 +------------------+-----------+ 6 | Log_name | File_size | 7 +------------------+-----------+ 8 | mysql-bin.000013 | 217 | 9 | mysql-bin.000014 | 1341 | 10 | mysql-bin.000015 | 217 | 11 | mysql-bin.000016 | 680 | 12 | mysql-bin.000017 | 268435617 | 13 | mysql-bin.000018 | 72724171 | 14 | mysql-bin.000019 | 241 | 15 | mysql-bin.000020 | 11019314 | 16 | mysql-bin.000021 | 241 | 17 | mysql-bin.000022 | 1305983 | 18 | mysql-bin.000023 | 268435590 | 19 | mysql-bin.000024 | 9566499 | 20 | mysql-bin.000025 | 19081875 | 21 | mysql-bin.000026 | 27801367 | 22 | mysql-bin.000027 | 194 | 23 +------------------+-----------+ 24 15 rows in set (0.00 sec) 25 26 root@localhost:mysql3306.sock [zlm]09:18:10>delete from test_flashbk; 27 Query OK, 100000 rows affected (1.19 sec) 28 29 root@localhost:mysql3306.sock [zlm]09:18:43>select count(*) from test_flashbk; 30 +----------+ 31 | count(*) | 32 +----------+ 33 | 0 | 34 +----------+ 35 1 row in set (0.00 sec) 36 37 root@localhost:mysql3306.sock [zlm]09:18:50>checksum table test_flashbk; 38 +------------------+----------+ 39 | Table | Checksum | 40 +------------------+----------+ 41 | zlm.test_flashbk | 0 | 42 +------------------+----------+ 43 1 row in set (0.00 sec) 44 45 root@localhost:mysql3306.sock [zlm]09:19:05>flush logs; 46 Query OK, 0 rows affected (0.12 sec) 47 48 root@localhost:mysql3306.sock [zlm]09:19:16>show binary logs; 49 +------------------+-----------+ 50 | Log_name | File_size | 51 +------------------+-----------+ 52 | mysql-bin.000013 | 217 | 53 | mysql-bin.000014 | 1341 | 54 | mysql-bin.000015 | 217 | 55 | mysql-bin.000016 | 680 | 56 | mysql-bin.000017 | 268435617 | 57 | mysql-bin.000018 | 72724171 | 58 | mysql-bin.000019 | 241 | 59 | mysql-bin.000020 | 11019314 | 60 | mysql-bin.000021 | 241 | 61 | mysql-bin.000022 | 1305983 | 62 | mysql-bin.000023 | 268435590 | 63 | mysql-bin.000024 | 9566499 | 64 | mysql-bin.000025 | 19081875 | 65 | mysql-bin.000026 | 27801367 | 66 | mysql-bin.000027 | 1908620 | 67 | mysql-bin.000028 | 194 | 68 +------------------+-----------+ 69 16 rows in set (0.00 sec) 70 71 root@localhost:mysql3306.sock [zlm]09:19:20>
then,i will use MyFlash tool to generate the flashback file which will contain the miss deleted records of the test table by the operatoin just now.
1 [root@zlm1 09:24:59 /vagrant/MyFlash-master/binary] 2 #ls -l 3 total 7366 4 -rwxrwxrwx 1 vagrant vagrant 78542 Oct 25 2017 flashback 5 -rwxrwxrwx 1 vagrant vagrant 7463125 Oct 25 2017 mysqlbinlog20160408 6 7 [root@zlm1 09:25:02 /vagrant/MyFlash-master/binary] 8 #./flashback --databaseNames zlm --tableNames test_flashbk --sqlTypes='DELETE' --binlogFileNames=/data/mysql/mysql3306/logs/mysql-bin.000027 9 10 [root@zlm1 09:25:04 /vagrant/MyFlash-master/binary] 11 #ls -l 12 total 9230 13 -rwxrwxrwx 1 vagrant vagrant 1908335 Jun 3 09:25 binlog_output_base.flashback 14 -rwxrwxrwx 1 vagrant vagrant 78542 Oct 25 2017 flashback 15 -rwxrwxrwx 1 vagrant vagrant 7463125 Oct 25 2017 mysqlbinlog20160408 16 17 [root@zlm1 09:25:06 /vagrant/MyFlash-master/binary] 18 19 #mysqlbinlog --skip-gtids binlog_output_base.flashback | mysql
now,let's check the records of the test table "test_flashbk" in another session with mysql client,finally you'll find the data turns back again:
1 root@localhost:mysql3306.sock [zlm]09:19:20>select count(*) from test_flashbk; 2 ERROR 2006 (HY000): MySQL server has gone away 3 No connection. Trying to reconnect... 4 Connection id: 20 5 Current database: zlm 6 7 +----------+ 8 | count(*) | 9 10 11 +----------+ 12 | 100000 | 13 +----------+ 14 1 row in set (0.04 sec) 15 16 root@localhost:mysql3306.sock [zlm]09:26:10>checksum table test_flashbk; 17 +------------------+------------+ 18 | Table | Checksum | 19 +------------------+------------+ 20 | zlm.test_flashbk | 1638389274 | 21 +------------------+------------+ 22 1 row in set (0.06 sec) 23 24 root@localhost:mysql3306.sock [zlm]09:26:24>
moreover,i test the flashback of insertion operation as below:
1 root@localhost:mysql3306.sock [zlm]10:08:04>delete from test_flashbk; 2 Query OK, 100000 rows affected (1.08 sec) 3 4 root@localhost:mysql3306.sock [zlm]10:08:08>checksum table test_flashbk; 5 +------------------+----------+ 6 | Table | Checksum | 7 +------------------+----------+ 8 | zlm.test_flashbk | 0 | 9 +------------------+----------+ 10 1 row in set (0.01 sec) 11 12 root@localhost:mysql3306.sock [zlm]10:08:15>flush logs; 13 Query OK, 0 rows affected (0.06 sec) 14 15 root@localhost:mysql3306.sock [zlm]10:08:50>show binary logs; 16 +------------------+-----------+ 17 | Log_name | File_size | 18 +------------------+-----------+ 19 | mysql-bin.000013 | 217 | 20 | mysql-bin.000014 | 1341 | 21 | mysql-bin.000015 | 217 | 22 | mysql-bin.000016 | 680 | 23 | mysql-bin.000017 | 268435617 | 24 | mysql-bin.000018 | 72724171 | 25 | mysql-bin.000019 | 241 | 26 | mysql-bin.000020 | 11019314 | 27 | mysql-bin.000021 | 241 | 28 | mysql-bin.000022 | 1305983 | 29 | mysql-bin.000023 | 268435590 | 30 | mysql-bin.000024 | 9566499 | 31 | mysql-bin.000025 | 19081875 | 32 | mysql-bin.000026 | 27801367 | 33 | mysql-bin.000027 | 1908620 | 34 | mysql-bin.000028 | 1908617 | 35 | mysql-bin.000029 | 8337364 | 36 | mysql-bin.000030 | 194 | 37 +------------------+-----------+ 38 18 rows in set (0.00 sec) 39 40 root@localhost:mysql3306.sock [zlm]10:08:55>call pro_flashbk(); 41 Query OK, 1 row affected (14.59 sec) 42 43 root@localhost:mysql3306.sock [zlm]10:09:23>select count(*) from test_flashbk; 44 +----------+ 45 | count(*) | 46 +----------+ 47 | 100000 | 48 +----------+ 49 1 row in set (0.03 sec) 50 51 root@localhost:mysql3306.sock [zlm]10:09:42>checksum table test_flashbk; 52 +------------------+------------+ 53 | Table | Checksum | 54 +------------------+------------+ 55 | zlm.test_flashbk | 3779450226 | 56 +------------------+------------+ 57 1 row in set (0.05 sec) 58 59 root@localhost:mysql3306.sock [zlm]10:10:01>show binary logs; 60 +------------------+-----------+ 61 | Log_name | File_size | 62 +------------------+-----------+ 63 | mysql-bin.000013 | 217 | 64 | mysql-bin.000014 | 1341 | 65 | mysql-bin.000015 | 217 | 66 | mysql-bin.000016 | 680 | 67 | mysql-bin.000017 | 268435617 | 68 | mysql-bin.000018 | 72724171 | 69 | mysql-bin.000019 | 241 | 70 | mysql-bin.000020 | 11019314 | 71 | mysql-bin.000021 | 241 | 72 | mysql-bin.000022 | 1305983 | 73 | mysql-bin.000023 | 268435590 | 74 | mysql-bin.000024 | 9566499 | 75 | mysql-bin.000025 | 19081875 | 76 | mysql-bin.000026 | 27801367 | 77 | mysql-bin.000027 | 1908620 | 78 | mysql-bin.000028 | 1908617 | 79 | mysql-bin.000029 | 8337364 | 80 | mysql-bin.000030 | 27800194 | 81 +------------------+-----------+ 82 18 rows in set (0.00 sec)
1 [root@zlm1 10:06:23 /vagrant/MyFlash-master/binary] 2 #ls -l 3 total 10505 4 -rwxrwxrwx 1 vagrant vagrant 3214328 Jun 3 10:06 binlog_output_base.flashback 5 -rwxrwxrwx 1 vagrant vagrant 78542 Oct 25 2017 flashback 6 -rwxrwxrwx 1 vagrant vagrant 7463125 Oct 25 2017 mysqlbinlog20160408 7 8 [root@zlm1 10:10:32 /vagrant/MyFlash-master/binary] 9 #rm -f binlog_output_base.flashback 10 11 [root@zlm1 10:10:35 /vagrant/MyFlash-master/binary] 12 #./flashback --databaseNames zlm --tableNames test_flashbk --sqlTypes='INSERT' --binlogFileNames=/data/mysql/mysql3306/logs/mysql-bin.000030 13 14 [root@zlm1 10:12:21 /vagrant/MyFlash-master/binary] 15 #ls -l 16 total 18206 17 -rwxrwxrwx 1 vagrant vagrant 11100123 Jun 3 10:12 binlog_output_base.flashback 18 -rwxrwxrwx 1 vagrant vagrant 78542 Oct 25 2017 flashback 19 -rwxrwxrwx 1 vagrant vagrant 7463125 Oct 25 2017 mysqlbinlog20160408 20 21 [root@zlm1 10:12:58 /vagrant/MyFlash-master/binary] 22 #mysqlbinlog --skip-gtids binlog_output_base.flashback | mysql
1 root@localhost:mysql3306.sock [zlm]10:10:16>select count(*) from test_flashbk; 2 ERROR 2006 (HY000): MySQL server has gone away 3 No connection. Trying to reconnect... 4 Connection id: 27 5 Current database: zlm 6 7 +----------+ 8 | count(*) | 9 +----------+ 10 | 0 | 11 +----------+ 12 1 row in set (0.00 sec) 13 14 root@localhost:mysql3306.sock [zlm]10:23:48>show binary logs; 15 +------------------+-----------+ 16 | Log_name | File_size | 17 +------------------+-----------+ 18 | mysql-bin.000013 | 217 | 19 | mysql-bin.000014 | 1341 | 20 | mysql-bin.000015 | 217 | 21 | mysql-bin.000016 | 680 | 22 | mysql-bin.000017 | 268435617 | 23 | mysql-bin.000018 | 72724171 | 24 | mysql-bin.000019 | 241 | 25 | mysql-bin.000020 | 11019314 | 26 | mysql-bin.000021 | 241 | 27 | mysql-bin.000022 | 1305983 | 28 | mysql-bin.000023 | 268435590 | 29 | mysql-bin.000024 | 9566499 | 30 | mysql-bin.000025 | 19081875 | 31 | mysql-bin.000026 | 27801367 | 32 | mysql-bin.000027 | 1908620 | 33 | mysql-bin.000028 | 1908617 | 34 | mysql-bin.000029 | 8337364 | 35 | mysql-bin.000030 | 55300194 | 36 +------------------+-----------+ 37 18 rows in set (0.00 sec) 38 39 root@localhost:mysql3306.sock [zlm]10:24:22>checksum table test_flashbk; 40 ERROR 2006 (HY000): MySQL server has gone away 41 No connection. Trying to reconnect... 42 Connection id: 28 43 Current database: zlm 44 45 +------------------+----------+ 46 | Table | Checksum | 47 +------------------+----------+ 48 | zlm.test_flashbk | 0 | 49 +------------------+----------+ 50 1 row in set (0.00 sec) 51 52 root@localhost:mysql3306.sock [zlm]10:31:04>
in the end, i test the flashback of update operation,i still get some faults:
1 root@localhost:mysql3306.sock [zlm]10:40:15>call pro_flashbk(); 2 ERROR 2006 (HY000): MySQL server has gone away 3 No connection. Trying to reconnect... 4 Connection id: 29 5 Current database: zlm 6 7 Query OK, 1 row affected (14.02 sec) 8 9 root@localhost:mysql3306.sock [zlm]10:40:43>select count(*) from test_flashbk; 10 +----------+ 11 | count(*) | 12 +----------+ 13 | 100000 | 14 +----------+ 15 1 row in set (0.04 sec) 16 17 root@localhost:mysql3306.sock [zlm]10:41:41>checksum table test_flashbk; 18 +------------------+------------+ 19 | Table | Checksum | 20 +------------------+------------+ 21 | zlm.test_flashbk | 3977604217 | 22 +------------------+------------+ 23 1 row in set (0.06 sec) 24 25 root@localhost:mysql3306.sock [zlm]10:41:50>flush logs; 26 Query OK, 0 rows affected (0.07 sec) 27 28 root@localhost:mysql3306.sock [zlm]10:42:09>show binary logs; 29 +------------------+-----------+ 30 | Log_name | File_size | 31 +------------------+-----------+ 32 | mysql-bin.000013 | 217 | 33 | mysql-bin.000014 | 1341 | 34 | mysql-bin.000015 | 217 | 35 | mysql-bin.000016 | 680 | 36 | mysql-bin.000017 | 268435617 | 37 | mysql-bin.000018 | 72724171 | 38 | mysql-bin.000019 | 241 | 39 | mysql-bin.000020 | 11019314 | 40 | mysql-bin.000021 | 241 | 41 | mysql-bin.000022 | 1305983 | 42 | mysql-bin.000023 | 268435590 | 43 | mysql-bin.000024 | 9566499 | 44 | mysql-bin.000025 | 19081875 | 45 | mysql-bin.000026 | 27801367 | 46 | mysql-bin.000027 | 1908620 | 47 | mysql-bin.000028 | 1908617 | 48 | mysql-bin.000029 | 8337364 | 49 | mysql-bin.000030 | 83100241 | 50 | mysql-bin.000031 | 194 | 51 +------------------+-----------+ 52 19 rows in set (0.00 sec) 53 54 root@localhost:mysql3306.sock [zlm]10:42:18>update test_flashbk set name='zlm'; 55 Query OK, 100000 rows affected (2.65 sec) 56 Rows matched: 100000 Changed: 100000 Warnings: 0 57 58 root@localhost:mysql3306.sock [zlm]10:42:53>show binary logs; 59 +------------------+-----------+ 60 | Log_name | File_size | 61 +------------------+-----------+ 62 | mysql-bin.000013 | 217 | 63 | mysql-bin.000014 | 1341 | 64 | mysql-bin.000015 | 217 | 65 | mysql-bin.000016 | 680 | 66 | mysql-bin.000017 | 268435617 | 67 | mysql-bin.000018 | 72724171 | 68 | mysql-bin.000019 | 241 | 69 | mysql-bin.000020 | 11019314 | 70 | mysql-bin.000021 | 241 | 71 | mysql-bin.000022 | 1305983 | 72 | mysql-bin.000023 | 268435590 | 73 | mysql-bin.000024 | 9566499 | 74 | mysql-bin.000025 | 19081875 | 75 | mysql-bin.000026 | 27801367 | 76 | mysql-bin.000027 | 1908620 | 77 | mysql-bin.000028 | 1908617 | 78 | mysql-bin.000029 | 8337364 | 79 | mysql-bin.000030 | 83100241 | 80 | mysql-bin.000031 | 3214566 | 81 +------------------+-----------+ 82 19 rows in set (0.00 sec)
1 [root@zlm1 10:34:59 /vagrant/MyFlash-master/binary] 2 #rm -f binlog_output_base.flashback 3 4 [root@zlm1 10:43:51 /vagrant/MyFlash-master/binary] 5 #./flashback --databaseNames zlm --tableNames test_flashbk --sqlTypes='UPDATE' --binlogFileNames=/data/mysql/mysql3306/logs/mysql-bin.000031 6 7 [root@zlm1 10:44:21 /vagrant/MyFlash-master/binary] 8 #ls -l 9 total 10505 10 -rwxrwxrwx 1 vagrant vagrant 3214328 Jun 3 10:44 binlog_output_base.flashback 11 -rwxrwxrwx 1 vagrant vagrant 78542 Oct 25 2017 flashback 12 -rwxrwxrwx 1 vagrant vagrant 7463125 Oct 25 2017 mysqlbinlog20160408 13 14 [root@zlm1 10:44:45 /vagrant/MyFlash-master/binary] 15 #mysqlbinlog --skip-gtids binlog_output_base.flashback | mysql 16 ERROR 2006 (HY000) at line 802: MySQL server has gone away 17 18 [root@zlm1 10:45:04 /vagrant/MyFlash-master/binary] 19 #
1 root@localhost:mysql3306.sock [zlm]10:43:04>checksum table test_flashbk; 2 ERROR 2006 (HY000): MySQL server has gone away 3 No connection. Trying to reconnect... 4 Connection id: 31 5 Current database: zlm 6 7 +------------------+------------+ 8 | Table | Checksum | 9 +------------------+------------+ 10 | zlm.test_flashbk | 3327989847 | 11 +------------------+------------+ 12 1 row in set (0.07 sec) 13 14 root@localhost:mysql3306.sock [zlm]11:04:18>show binary logs; 15 +------------------+-----------+ 16 | Log_name | File_size | 17 +------------------+-----------+ 18 | mysql-bin.000013 | 217 | 19 | mysql-bin.000014 | 1341 | 20 | mysql-bin.000015 | 217 | 21 | mysql-bin.000016 | 680 | 22 | mysql-bin.000017 | 268435617 | 23 | mysql-bin.000018 | 72724171 | 24 | mysql-bin.000019 | 241 | 25 | mysql-bin.000020 | 11019314 | 26 | mysql-bin.000021 | 241 | 27 | mysql-bin.000022 | 1305983 | 28 | mysql-bin.000023 | 268435590 | 29 | mysql-bin.000024 | 9566499 | 30 | mysql-bin.000025 | 19081875 | 31 | mysql-bin.000026 | 27801367 | 32 | mysql-bin.000027 | 1908620 | 33 | mysql-bin.000028 | 1908617 | 34 | mysql-bin.000029 | 8337364 | 35 | mysql-bin.000030 | 83100241 | 36 | mysql-bin.000031 | 3214566 | 37 +------------------+-----------+ 38 19 rows in set (0.00 sec) 39 40 root@localhost:mysql3306.sock [zlm]11:04:47>select count(*) from test_flashbk where name='aaron8219'; 41 +----------+ 42 | count(*) | 43 +----------+ 44 | 0 | 45 +----------+ 46 1 row in set (0.04 sec) 47 48 root@localhost:mysql3306.sock [zlm]11:05:24>
i guess,there're some compatibility issues with the tool,'cause i got the inscrutable phenomenon when using it doing flashback of update operation last night.
Summary:
- MyFlash is fast and convenient to flashback some insertion and deletion operations.
- it still has some unpredictable issue when doing flashback of update.
- as far as i know,it is faster then another tool named "binlog2sql" which one is released by Mertuan-Dianping too.
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