When you install Oracle database, you are installing a large application that your computer can support. Using multiple Oracle homes and Optimal Flexible Architecture provides many advantages when administering large databases. The following advantages are important:
Structured organization of directories and files, and consistent naming for database files simplify database administration.
Distribution of I/O across multiple disks prevents performance bottlenecks caused by multiple read or write commands issued simultaneously to a single drive.
Distribution of applications across multiple disks safeguards against database failures.
Login home directories are not at risk when database administrators add, move, or delete Oracle home directories.
Multiple databases, of different versions, owned by different users can coexist concurrently.
Software upgrades can be tested in an Oracle home in a separate directory from the Oracle home where your production database is located.
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最优灵活体系结构（Optimal Flexible Architecture,OFA）
原文地址：http://www.cnblogs.com/gispf/p/3754778.html
