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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 firstname.lastname@example.org http://www.idevelopment.info ----------------------------