title: MySQL:How do I enable innoDB?
body: <p>I have installed MySQL for a while, but now I found I need to use <code>InnoDB</code> engine, but there's no such engine yet:</p>
  
  <pre><code>mysql&gt; show engines;
  +------------+---------+-----------------------------------------------------------+--------------+------+------------+
  | Engine     | Support | Comment                                                   | Transactions | XA   | Savepoints |
  +------------+---------+-----------------------------------------------------------+--------------+------+------------+
  | CSV        | YES     | CSV storage engine                                        | NO           | NO   | NO         |
  | MRG_MYISAM | YES     | Collection of identical MyISAM tables                     | NO           | NO   | NO         |
  | MEMORY     | YES     | Hash based, stored in memory, useful for temporary tables | NO           | NO   | NO         |
  | MyISAM     | DEFAULT | Default engine as of MySQL 3.23 with great performance    | NO           | NO   | NO         |
  +------------+---------+-----------------------------------------------------------+--------------+------+------------+
  4 rows in set (0.00 sec)
  </code></pre>
  
  <p>But I found MySQL has <code>InnoDB</code>'s libs in its plugin dir:</p>
  
  <pre><code>root@AY130703163117124510Z plugin]# ls
  ha_archive.a         ha_blackhole.la        ha_example.so        ha_federated.so.0      ha_innodb_plugin.so        libdaemon_example.a         mypluglib.la
  ha_archive.la        ha_blackhole.so        ha_example.so.0      ha_federated.so.0.0.0  ha_innodb_plugin.so.0      libdaemon_example.la        mypluglib.so
  ha_archive.so        ha_blackhole.so.0      ha_example.so.0.0.0  ha_innodb.a            ha_innodb_plugin.so.0.0.0  libdaemon_example.so        mypluglib.so.0
  ha_archive.so.0      ha_blackhole.so.0.0.0  ha_federated.a       ha_innodb.la           ha_innodb.so               libdaemon_example.so.0      mypluglib.so.0.0.0
  ha_archive.so.0.0.0  ha_example.a           ha_federated.la      ha_innodb_plugin.a     ha_innodb.so.0             libdaemon_example.so.0.0.0
  ha_blackhole.a       ha_example.la          ha_federated.so      ha_innodb_plugin.la    ha_innodb.so.0.0.0         mypluglib.a
  [root@AY130703163117124510Z plugin]# 
  </code></pre>
  
  <p>I don't want to meet any uncertain problem, so how do I make <code>InnoDB</code> enabled ?</p>