The advantages of the archiving of online redo log files

The advantages of the archiving of online redo log files

■ A database backup, with online and archived redo log files, guarantees that you can recover all committed transactions if the operating system or hardware fails.

■ You can recover the database using a backup that was taken while the database was open and being used, if you have a copy of the archived log files that were written while the database was being backed up.
■ You can perform online tablespace backups, and use these backups to restore a tablespace following media failure.

■ You can keep a standby database current with its original database by continuously applying the original archived redo log files to the standby database.

在线重作日志归档文件的优势：

■ 数据库经过在线归档重作日志文件的备份，能够保证在系统或者硬件出现故障的状况下，恢复全部已提交事务。

■ 若是你有一个归档日志文件是数据库正在备份时写入的，你能够在数据库打开而且被使用的状况下使用备份恢复数据库。

■ 你能够执行在线表空间备份，在出现介质故障时使用这些备份来恢复表空间。

■ 当原始数据库正在持续将原始的归档重作日志文件应用到备用数据库时，你能够保持一个备用的当前数据库。