与脱机备份不一样，联机备份只要求备份数据文件和控制文件。
Unlike offline backup, online backup only requires that data files and control files be backed up.
对于联机备份数据文件，这将导致生成大量的重做日志。
This will result in enormous redo logs to be generated for online backup data files.
这些任务包括轮转日志文件以避免装满文件系统、备份数据和连接时间服务器来执行系统时间同步。
These include rotating log files so filesystems do not become full, backing up data, and connecting to a time server to keep your system time synchronized.
文件与文件组备份——一次备份数据库的一部分。
File and file group backup — Backs up a portion of the database at a time.
同样，别以为备份文件系统就可以备份数据库。
And again, don't attempt to back up your filesystem with the hope to back up your databases as well.
这时会提示你可以将数据库文件添加到项目中；我选择的是“No”(否)，因为我不需要将我的数据库和工程一起发布，同时还由于我只喜欢在机器上只有一份数据库的文件。
You'll be prompted to add the database file to the project if you like; I selected "No" since I don't need to distribute my database with my project and prefer to just have one copy on my machine.
当发出“AlterTablespace ts_nameEndBackup”时，在联机备份数据文件的的文件头中再次记录了检查点scn。
When Alter Tablespace ts_name End backup is issued, again a checkpoint SCN is recorded at the headers of online backup data files.
DirectoryServer存储用户概要文件并提供一个可信的身份数据基础架构来实现身份验证。
Directory Server stores user profiles and provides a trusted identity data infrastructure for authentication.
停机时间将可能比以往的更长，因为除了备份数据库以及优化数据表，我们还要将项目文件移动至文件服务器上。
Today's down time is expected to be a bit longer than usual because, in addition to backing up our database and optimizing tables, we are also going to move our project files over to the file server.
如果你不愿意花点时间备份数据，要是硬盘崩溃，你需要花多少时间恢复文件？
If you don't spend the time to backup your data and the hard drive crashes, how much time will you waste trying to recover files?
可以弄一个和源数据库一样的备份数据库，通过源数据库生成的归档日志文件，把源数据库里的数据同步到备份数据库中。
You can keep a standby database current with its original database by continuously applying the original archived redo logs to the standby database.
研究者之所以提出数字签名方案，就是为了使个人或组织能“数字地”对某份数字文件签名。
The purpose of the digital signature is to enable one person or certain organization to "digitally" sign some type of digital document.
如有任何数据及文件与经份数据不同，将以此份数据为主要参考。
If there is any data or related documentation different from this data sheet, this data sheet is the principle reference.
随着电力系统备份数据量的增加，迫切需要开发高效、快速的文件同步程序来维护数据安全。
To guarantee the security of power system data, it is imperative to satisfy the need to develop a fast and efficient file synchronizer.
设置文件存储的份数是否影响写/读的速度？
Similarly, the writing speed is not much affected by the goal setting.
我倒是觉得楼主的译文就很好，应该是删除，而且也不是防止文件未来有什么改动，就应该是删除未来文件改动时的备份数据。
Once the original file is stored, the technology removes duplicate data down to the block or byte level on all future changes to that file.
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.
如果你更换了域，编辑备份数据库文件来反应出这一点。
If you are moving WordPress from one server to another, begin by backing up your data.
如果你更换了域，编辑备份数据库文件来反应出这一点。
If you are moving WordPress from one server to another, begin by backing up your data.
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