Oracle Cloud File System (CloudFS) is a storage management suite developed by

Oracle Corporation Oracle Corporation is an American multinational computer technology corporation headquartered in Austin, Texas. In 2020, Oracle was the third-largest software company in the world by revenue and market capitalization. The company sells da ...

. CloudFS consists of a cluster file system called ASM Cluster File System (ACFS), and a cluster volume manager called ASM Dynamic Volume Manager (ADVM) initially released in August 2007.

Features

ACFS is a standard-based

POSIX The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines both the system- and user-level application programming inte ...

(Linux, UNIX) and Windows

cluster file system A clustered file system is a file system which is shared by being simultaneously mounted on multiple servers. There are several approaches to clustering, most of which do not employ a clustered file system (only direct attached storage for ...

with full cluster-wide file and memory mapped I/O cache coherency and file locking. ACFS provides direct I/O for Oracle database I/O workloads. ACFS implements indirect I/O however for general purpose files that typically perform small I/O for better response time. CloudFS is designed to scale to billions of files and supports very large file and file systems sizes (up to exabytes of storage).
CloudFS is built on top of Oracle Automatic Storage Management (ASM) and Oracle clustering technologies to provide cluster volume and file services to clients. ADVM and ACFS leverage ASM striping, mirroring and automatic I/O rebalancing features to manage volumes that are dynamically resizable. Starting with the latest release in Oracle Database 12c, ACFS supports Oracle database files as well as general purpose files. ACFS supports space efficient read-write snapshots, asynchronous file system replication, tagging for aggregate operations, fine grain security and encryption for higher security.

Version history

* CloudFS in Oracle Database 11g Release 1, August 2007 * CloudFS in Oracle Database 11g Release 2, September 2009 * CloudFS in Oracle Database 12c Release 1, January 2013

References

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External links

Oracle Web Site - CloudFS (ACFS/ADVM)

Oracle Cloud File System Overview White Paper
Oracle software