Hierarchical File System (IBM MVS)

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HFS
MVS/ESA
V5R1 and higher (optional for V4R3)

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

z System
mainframes.

IBM functionally stabilized HFS starting with z/OS 1.7, in 2005.

z/OS File System (zFS) was released as the higher performance successor to HFS in 1995, and IBM recommended migration from HFS to zFS. Following the release of zFS, z/OS releases included a tool, BPXWH2Z, to convert HFS to zFS.[7]

IBM dropped the use of HFS in z/OS 2.5, in 2021.[6]

References

  1. .
  2. ^ "OPENEDITION SERVICES ON MVS/ESA SP VERSION 4 RELEASE 3 ANNOUNCED AND AVAILABILITY OF MVS/ESA SP VERSION 4 RELEASE 3 WITH ADDITIONAL ENHANCEMENTS". Announcement letters. IBM. February 9, 1993. 293-060. Retrieved January 28, 2022.
  3. ^ "Hierarchical File System Usage Guide" (PDF). IBM. September 2000. Retrieved 2016-09-01.
  4. ^ "DFSMS/MVS Version 1 Release 2". Announcement letters. IBM. March 1, 1994. 294-095. Retrieved January 28, 2022.
  5. ^ "IBM MVS/ESA SP Version 5 Release 1 and OpenEdition Enhancements". Announcement letters. IBM. April 6, 1994. 294-152. Retrieved January 28, 2022.
  6. ^ a b Shacklett, Mary E.; Bigelow, Stephen J. "What is z/OS?". TechTarget. Retrieved March 2, 2023.
  7. ^ IBM (January 2008). "HFS to zFS Migration Tool" (PDF). Retrieved 2016-09-01.