Record Management Services

Record Management Services (RMS) are procedures in the VMS, RSTS/E, RT-11 and RSX-11M operating systems that programs may call to process files and records within files.^[1]^[2] Its file formats and procedures are similar to of those in some IBM access methods^[a] for several of its mainframe computer operating systems^[b] and by other vendors for file and record management. VMS RMS is an integral part of the system software; its procedures run in executive mode. (RMS was not integrated into RT-11 and RSTS/E, but was available as a "layered product".)

RMS supports four record access methods:

Sequential Access
Relative Record Number Access
Record File Address Access
Indexed Access

RMS supports four record formats:

Fixed length
Variable length
Variable record length with fixed-length control blocks
Stream files (records separated by termination characters)
- STREAM: Records terminated by CRLF
- STREAM_CR: Records terminated by CR
- STREAM_LF: Records terminated by LF

Digital provided the File Definition Language (FDL) which could be used to define the structure of an RMS file.^[3]^{[permanent dead link‍]}

Notes

^
Primarily
- BDAM
- BSAM
- ISAM
- QSAM
- Virtual Storage Access Method (VSAM)
^
Primarily
- DOS/360 and successors through z/VSE
- OS/360 and successors through z/OS
- TSS/360 and TSS/370

References

^ VAX-11 Record Management Services Reference Manual (PDF). DEC. February 1979. AA-D031B-TE.
^ OpenVMS Record Management Services Reference Manual. June 2002. p. 23. Retrieved 20 November 2017.
^ itec.suny.edu. April 2001 https://www.itec.suny.edu/scsys/vms/ovmsdoc073/v73/6027/6027pro.html. Retrieved 2021-01-03. {{cite web}}: Missing or empty |title= (help)

External links

[3] Primarily
BDAM

BSAM

ISAM

QSAM

Virtual Storage Access Method (VSAM)

[2] BDAM

[3] BSAM

[4] ISAM

[5] QSAM

[6] Virtual Storage Access Method (VSAM)

[4] Primarily
DOS/360 and successors through z/VSE

OS/360 and successors through z/OS

TSS/360 and TSS/370

[8] DOS/360 and successors through z/VSE

[9] OS/360 and successors through z/OS

[10] TSS/360 and TSS/370

[DECRMS-1] VAX-11 Record Management Services Reference Manual (PDF). DEC. February 1979. AA-D031B-TE.

[HPRMS1-2] OpenVMS Record Management Services Reference Manual. June 2002. p. 23. Retrieved 20 November 2017.

[5] itec.suny.edu. April 2001 https://www.itec.suny.edu/scsys/vms/ovmsdoc073/v73/6027/6027pro.html. Retrieved 2021-01-03. {{cite web}}: Missing or empty |title= (help)

[1]

[2]

[a]

[b]

[3]