RHEL5上安装Oracle10.2

1.5.1 Database Storage Options

If you choose to create a database during the installation, you can specify one of three storage options for database files:

1.5.1.1 File System

If you choose the file system option, then Database Configuration Assistant creates the database files in a directory on a file system mounted on the computer. Oracle recommends that the file system you choose be separate from the file systems used by the operating system or the Oracle software. The file system that you choose can be any of the following:

1. 如果文件系统是直连物理磁盘（DAS）而没有做LVM或这RAID，那么建议oracle在安装时将文件分布式地安装在多个物理磁盘上，比如产品或库分别装在不同的物理磁盘上，这样可以减少I/O争用。

2. 如果文件系统在LVM或者RAID上，Oracle建议使用条带化（strip）和镜像（mirror）技术来增强性能（performance）和可靠性（reliability）。如果使用这种技术思想，那么你必须指定多个文件系统装载点（分区）来存储数据库.

3. 如果你使用了共享存储设备（NAS），那么可以使用网络文件系统（NFS）来存储数据库文件。

1.5.1.2 Automatic Storage Management

Automatic Storage Management is a high-performance storage management solution for Oracle Database files. It simplifies the management of a dynamic database environment, such as creating and laying out databases and managing disk space.

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1.5.1.3 Raw Devices

Raw devices are disk partitions or logical volumes that have not been formatted with a file system. When you use raw devices for database file storage, Oracle writes data directly to the partition or volume, bypassing the operating system file system layer. For this reason, you can sometimes achieve performance gains by using raw devices. However, because raw devices can be difficult to create and administer, and because the performance gains over modern file systems are minimal, Oracle recommends that you choose Automatic Storage Management or file system storage in preference to raw devices.

看得出oracle并不建议使用RAW设备来存储数据库文件。

su - oracle

如果运行xclock出错，提示：

Xlib: connection to ":0.0" refused by server

在X window环境下 $DISPLAY=:0.0

可以按照如下来解决：
在root用户下运行xhost +localhost，然后再su到oracle下即可。

4.3.1 Configuring Oracle Net Services

If you have a previous release of Oracle software installed on this system, you might want to copy information from the Oracle Net tnsnames.ora and listener.ora configuration files from the previous release to the corresponding files for the new release.

Note:

The default location for the tnsnames.ora and listener.ora files is the $ORACLE_HOME/network/admin/ directory.