After you have an Oracle Database installation properly configured, tuned, patched,
and tested, you may want to roll that exact installation out to other hosts. Reasons to
do this include the following:
■ You have multiple production database systems.
■ You want to create development and test systems that are identical to your
production system.
Instead of installing, tuning, and patching on each additional host, you can clone your
tested Oracle Database installation to other hosts, saving time and eliminating
inconsistencies. There are two types of cloning available to you:
■ Cloning an Oracle home—Just the configured and patched binaries from the
Oracle home directory and subdirectories are copied to the destination host and
"fixed" to match the new environment. You can then start an instance with this
cloned home and create a database.
You can use the Enterprise Manager Clone Oracle Home tool to clone an Oracle
home to one or more destination hosts. You can also manually clone an Oracle
home using a set of provided scripts and Oracle Universal Installer.
■ Cloning a database—The tuned database, including database files, initialization
parameters, and so on, are cloned to an existing Oracle home (possibly a cloned
home).
You can use the Enterprise Manager Clone Database tool to clone an Oracle
database instance to an existing Oracle home.

数据库管理员职责之 : 启动另外的主机
当数据库正确的配置 , 调优 , 打完补丁 , 可将安装信息复制到另外一个主机 , 用来将开发环境
与测试环境分隔开 . 这一步可采用克隆数据库方式进行 .
克隆数据库的方式 : 克隆数据库目录 , 克隆数据库(文件)