Oracle Automatic Storage Management Cluster File System
The Oracle Automatic Storage Management Cluster File System, or ASM Cluster File System ( ACFS ) for short, is a cluster file system from Oracle that was released with the Oracle database system version 11g Release 2.
ASM stands for Automatic Storage Management and is a Logical Volume Manager that was initially only introduced in version 10g Release 1 for storing database files. However, for application data that is stored outside the database, such as BFILEs (pointers from the database into the file system) or shared data for data loads, either the Oracle Cluster File System (OCFS) or a cluster file system was still required other manufacturer.
Oracle ACFS removes these restrictions and enabled the use of ASM version 11.2. as a universal storage manager for every file type with the exception of data files of the database itself. This restriction no longer applies with version 12c. It allows concurrent access to shared storage in a computer cluster . Not only can the Oracle database software be saved in ACFS in a common software directory (“Shared Home”) of the cluster, but since 12c also the entire database including parameter and password files.
From Oracle Database 11g Release 2, ACFS was initially available for Windows and Linux platforms. Further ports to Solaris and AIX followed. The further development of OCFS2 on Linux was handed over by Oracle to the open source community. OCFS2 for Linux is now fully integrated in some distributions . OCFS for Windows will be completely discontinued in favor of ACFS and will no longer be developed.
See also: file system
Web links
- Introduction to ASM Cluster File System (ACFS )
- Overview of cluster file systems in the Oracle environment
Individual evidence
- ↑ What's New in Oracle Database 11g Release 2 (11.2) (English)
- ↑ What Types of Files Does Oracle ASM Support? (English)
- ↑ [1] (English)