<pre name="code" class="sql"><pre name="code" class="sql">mysqldump備份myisam 預設不會鎖表:

[[email protected] data]$ mysqldump  test t4 >t4.sql




mysql>  insert into t4 values(30006,'a','a','20100101');
Query OK, 1 row affected (0.00 sec)

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> select max(student_id) from t4;
+-----------------+
| max(student_id) |
+-----------------+
|           30006 |
+-----------------+
1 row in set (0.00 sec)

為了保證資料的一致性：



mysqldump:
  -l, --lock-tables   Lock all tables for read.
                      (Defaults to on; use --skip-lock-tables to disable.)

只針對Innodb ,對myisam 不支援

mysqldump 備份myisam 時不鎖表

[
 
[email protected] ~]$ mysqldump  test t4>t4.sql
要鎖住的話 只能:
mysql> lock table t4 read;
Query OK, 0 rows affected (0.01 sec)

在進行備份