To decide on backup strategies, start with your data recovery requirements and your
data recovery strategy. Each type of data recovery will require that you take certain
types of backup.
决定数据库的备份策略，开始于你的数据还原要求和你数据还原的策略。任何一种数据还
原要求你拥有可靠的备份类型。
Failures can run the gamut from user error, datafile block corruption and media failure
to situations like the complete loss of a data center. How quickly you can resume
normal operation of your database is a function of what kinds of restore and recovery
techniques you include in your planning. Each restore and recovery technique will
impose requirements on your backup strategy, including which features of the Oracle
database you use to take, store and manage your backups.
错误发生来自于从用户错误，块的损坏和介质失败到数据文件的完全丢失。你可以多快的恢复 数据库
的正常操作取决于你修复和还原技术在你包含计划的类型。每个修复和还原技术将取决于你备份的
策略，包含你使用了哪些功能，以及存储和管理你的备份。
