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

Oracle Corporation Oracle Corporation is an American Multinational corporation, multinational computer technology company headquartered in Austin, Texas. Co-founded in 1977 in Santa Clara, California, by Larry Ellison, who remains executive chairman, Oracle was ...

. 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 application programming interfaces (APIs), along with comm ...

(Linux, UNIX) and Windows cluster file system with full cluster-wide file and memory mapped I/O cache coherency and

file locking File locking is a mechanism that restricts access to a computer file, or to a region of a file, by allowing only one user or process to modify or delete it at a specific time, and preventing reading of the file while it's being modified or delet ...

. ACFS provides direct I/O for

Oracle database Oracle Database (commonly referred to as Oracle DBMS, Oracle Autonomous Database, or simply as Oracle) is a proprietary multi-model database management system produced and marketed by Oracle Corporation. It is a database commonly used for ru ...

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.

References

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External links

Oracle Web Site - CloudFS (ACFS/ADVM)

Oracle Cloud File System Overview White Paper
Oracle software