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IBM's Hierarchical File System (HFS) is a POSIX-style hierarchical file system [1] for the MVS/ESA/SP through z/OS operating systems. IBM introduced HFS on February 9, 1993 in MVS/ESA System Product Version 4 Release 3 OpenEdition [ 2 ] [ 3 ] with DFSMS/MVS Version 1 Release 2 [ 4 ] for 3090 mainframes.
Example of a directory structure in a hierarchical file system. In computing, a hierarchical file system is a file system that uses directories to organize files into a tree structure. [1] In a hierarchical file system, directories contain information about both files and other directories, called subdirectories which, in turn, can point to ...
It included about 1 million new lines of code, which provide an API shell, utilities, and an extended user interface. Works with a hierarchical file system provided by DFSMS (Data Facility System Managed Storage). The shell and utilities are based on Mortice Kerns' InterOpen products. Independent specialists estimate that it was over 80% open ...
The IBM Information Management System (IMS) and RDM Mobile are examples of a hierarchical database system with multiple hierarchies over the same data. The hierarchical data model lost traction as Codd 's relational model became the de facto standard used by virtually all mainstream database management systems.
On April 19, 1988, IBM announced [9] the umbrella term Data Facility Storage Management Subsystem for facilities provided by the programs IBM MVS/Data Facility Product (MVS/DFP) Version 3 Release 1.0; IBM Data Facility Data Set Services [c] (DFDSS) Version 2 Release 4.0; IBM Data Facility Hierarchical Storage Manager (DFHSM) Version 2 Release 4.0
The IBM Information Management System (IMS) is a joint hierarchical database and information management system that supports transaction processing. [1] Development began in 1966 to keep track of the bill of materials for the Saturn V rocket of the Apollo program, and the first version on the IBM System/360 Model 65 was completed in 1967 as ICS/DL/I and officially installed in August 1968.
HFS – Hierarchical File System in IBM's MVS from MVS/ESA OpenEdition through z/OS V2R4; not to be confused with Apple's HFS. IBM stated that z/OS users should migrate from HFS to zFS, and in z/OS V2R5 dropped support for HFS. HFS – Hierarchical File System, in use until HFS+ was introduced on Mac OS 8.1. Also known as Mac OS Standard format.
Download QR code; Print/export ... move to sidebar hide. Help. IBM products: IBM System/360, 370 and later Operating Systems ... Hierarchical File System (IBM MVS)