As a user, you should be aware of the performance characteristics and optimization techniques for each approach.
作为用户，您应当了解每种方法的性能特征和优化技巧。
The end user is not aware of the Informix database server's existence, and the Cognos application handles the complete administration.
最终用户并不会意识到Informix数据库服务器的存在，由Cognos应用程序处理所有管理工作。
Thus, the user is immediately made aware that their credentials are invalid.
这样，用户马上就可以知道他们的凭证是无效的。
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