Newsletters Archive - All

If you would like to know more about the iDevelopment.info Newsletter, please email me.


  Using the Oracle ASM Cluster File System (Oracle ACFS) on Linux — (28-November-2010)

Introduced with Oracle ASM 11g release 2, Oracle ASM Cluster File System 
(Oracle ACFS) is a general purpose cluster file system implemented as part of 
Oracle Automatic Storage Management (Oracle ASM). Oracle ACFS extends the 
Oracle ASM architecture and is used to support many types of files which are 
typically maintained outside of the Oracle database. For example Oracle ACFS 
can be used to store BFILEs, database trace files, executables, report files 
and even general purpose files like image, text, video, and audio files. In 
addition, Oracle ACFS can be used as a shared file system for Oracle home 
binaries.

The features included with Oracle ACFS allow users to create, mount, and manage 
ACFS using familiar Linux commands. Oracle ACFS provides support for snapshots 
and the ability to dynamically resize existing file system online using Oracle 
ASM Dynamic Volume Manager (ADVM).

Oracle ACFS leverages Oracle ASM functionality that enables:

  * Oracle ACFS dynamic file system resizing
  * Maximized performance through direct access to Oracle ASM disk group storage
  * Balanced distribution of Oracle ACFS across Oracle ASM disk group storage for increased I/O parallelism
  * Data reliability through Oracle ASM mirroring protection mechanisms

My recent article on using the Oracle ASM Cluster File System provides a hands
on approach to creating and managing ACFS and ADVM on the Linux operating 
system using the following methods:

  * ASM Configuration Assistant (ASMCA)
  * Oracle Enterprise Manager (OEM)
  * Command Line / SQL / ASMCMD 

A full discussion on the different Oracle ACFS components will also be 
presented as well as snapshots, file system recovery, and management techniques.

Using the Oracle ASM Cluster File System (Oracle ACFS) on Linux

----------------------------
Jeffrey M. Hunter, OCP
Sr. Database Administrator
jhunter@idevelopment.info
http://www.idevelopment.info
----------------------------