不过，在进行这种情况的还原时，无法使数据还原，因为需要逻辑日志来达到并行模式下执行的备份的某个一致点。
However, in the case of a restore, you won't be able to get your data back because the logical logs are needed to reach a point of consistency for backups performed in parallel mode.
执行逻辑数据库备份，将数据和逻辑定义从数据库提取到一个文件。
Perform logical database backups as they extract data and logical definitions from the database to a file.
当发生数据毁坏事故，例如软件故障、硬件故障、错误的应用程序逻辑和用户错误后，可以使用这些备份将数据库恢复到适当的状态。
These backups can be used to restore databases to their proper state after data corruption events, such as software failures, hardware failures, bad application logic, and user errors.
这类备份脚本背后的逻辑很简单：从数据库取得一个表列表，迭代此列表并使用如DESC ？
The logic behind such a backup script is quite simple: obtain a list of tables from the database, iterate over this list and use commands such as DESC?
然后Manager Bean处理逻辑，通过访问合适的JPAAPI来与备份数据库相接（图3），来检索以及更新实体。
The Manager Bean then handles the logic for retrieving and updating entities by calling the appropriate JPA APIs to interface with the backend database (Figure 3).
数据库设计包括概念和逻辑设计、表结构设计、备份和恢复实现等。
The database design includes concept and logical design, table create, back up and recover.
DB 2数据库提供了物理备份与逻辑备份两种数据备份的方式。
DB2 Database system provide two kinds of backup methods, physical and logical.
本发明能够进行在线数据热备份，并提供文件逻辑块的增量备份方法，降低备份数据量，提高备份效率。
The method can carry out online data warm backup, provides an incremental backup method for file logical blocks, reduces backup data volume and improves the backup efficiency.
本发明能够进行在线数据热备份，并提供文件逻辑块的增量备份方法，降低备份数据量，提高备份效率。
The method can carry out online data warm backup, provides an incremental backup method for file logical blocks, reduces backup data volume and improves the backup efficiency.
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