The ASM cluster file system (ACFS) extends Automatic Storage Management (ASM) by providing a robust, modern, general-purpose, extent-based, and journaling file system.
ACFS provides support for files such as application binaries, report files, trace files, alert logs, and other application data files. With the addition of the ACFS, ASM becomes a complete storage management solution for both Oracle database and non-database files.
ACFS scales from small files to very large files (Exabyte) and supports a large number of nodes in a cluster. ACFS is an extent-based file system to provide high performance and utilizes a log-based metadata transaction engine for file system integrity and fast recovery.
ACFS file systems can be exported to remote clients through industry standard protocols such as NFS and CIFS.
ACFS eliminates the need for third-party cluster file system solutions and simplifies management for all file types in single node and grid computing environments.
ACFS supports dynamic file system expansion and contraction without any down time. ACFS makes use of the ASM mirroring and striping features in addition to hardware RAID functionality. ACFS can be managed with tools familiar to the DBA: Enterpriser Manager, SQL*Plus, and ASMCMD.
ACFS is integrated with the native OS file management tools, so the file system is transparent to the users. ASMCMD has UNIX-like syntax and command names that should be familiar to the system administrator and storage administrator. A new graphical tool (asmca) has been introduced to manage ASM and ACFS.
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