Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 5 - Preparing Shared Storage

Configuration of Automated Storage Management

One of the most significant new features in Oracle 10g release is the introduction of Automated Storage Management (ASM). In order to use the ASM in a shared mode for the use of RAC database, you need to create ASM instance in each node of the RAC database involving the same disk devices as input. Each ASM instance has either an SPFILE or PFILE type parameter file. To use ASM in the RAC environment, you only need to select ASM as your storage option when you create your database with the Database Configuration Assistant (DBCA).

What Is Automated Storage Management?

Automated Storage Management (ASM) was designed to simplify database administration. ASM eliminates the need for the DBA to directly manage the thousands of Oracle database files that could be present in a modern Oracle instance. ASM does this by enabling ASM disk groups, which are logical units comprised of disks and the files that reside on them. Using ASM, the management of thousands of Oracle files is reduced to managing a small number of disk groups.

The SQL statements used for creating database structures, such as tablespaces, redo logs, archive log files, and control files, must specify file location in terms of ASM disk groups, in order to use ASM. ASM will then create and manage the associated underlying files for you.

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