MariaDB和XtraDB/InnoDB插件

Question

在我的vps中，我考虑从MySQL切换到MariaDB (使用Monty的Debian挤压存储库)。通过将my.cnf从MySQL复制到MariaDB，我看到新的配置文件(来自MariaDB包的配置文件)没有提到任何插件命令，比如从MySQL加载InnoDB插件的旧插件命令。现在，我了解到XtraDB已经成为MariaDB中的默认ACID存储引擎，而不是InnoDB。由于我发现MariaDB站点的文档缺乏这方面的内容，所以需要在新的my.cnf中添加一些额外的内容来激活XtraDB还是默认情况下是活动的？show plugins返回如下内容：

MariaDB [(none)]> show plugins;
+--------------------------------+--------+--------------------+---------+---------+
| Name                           | Status | Type               | Library | License |
+--------------------------------+--------+--------------------+---------+---------+
| binlog                         | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| mysql_native_password          | ACTIVE | AUTHENTICATION     | NULL    | GPL     |
| mysql_old_password             | ACTIVE | AUTHENTICATION     | NULL    | GPL     |
| MyISAM                         | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| partition                      | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| ARCHIVE                        | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| BLACKHOLE                      | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| CSV                            | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| FEDERATED                      | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| MEMORY                         | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| Aria                           | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| MRG_MYISAM                     | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| PBXT                           | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| PBXT_STATISTICS                | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| InnoDB                         | ACTIVE | STORAGE ENGINE     | NULL    | GPL     |
| INNODB_RSEG                    | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_POOL_PAGES       | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_POOL_PAGES_INDEX | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_BUFFER_POOL_PAGES_BLOB  | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_TRX                     | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_LOCKS                   | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_LOCK_WAITS              | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_CMP                     | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_CMP_RESET               | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_CMPMEM                  | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_CMPMEM_RESET            | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_TABLE_STATS             | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_INDEX_STATS             | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| XTRADB_ADMIN_COMMAND           | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_SYS_TABLES              | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_SYS_INDEXES             | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| INNODB_SYS_STATS               | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
| XTRADB_ENHANCEMENTS            | ACTIVE | INFORMATION SCHEMA | NULL    | GPL     |
+--------------------------------+--------+--------------------+---------+---------+
33 rows in set (0.00 sec)

从上面的输出中我能理解什么？那个InnoDB=XtraDB？

Answer 1

从您的SHOW PLUGINS;中可以看出，InnoDB是存在的。XtraDB也存在。

如果要确定，必须运行SHOW ENGINES;。这将显示默认的存储引擎。XtraDB插件是活动的这一事实表明，必须使用XtraDB。