Record Management Services (RMS) are procedures in the VMS,

RSTS/E RSTS () is a multi-user time-sharing operating system developed by Digital Equipment Corporation (DEC, now part of Hewlett-Packard) for the PDP-11 series of 16-bit minicomputers. The first version of RSTS (RSTS-11, Version 1) was implemented in 1 ...

RT-11 RT-11 (Real-time 11) is a discontinued small, low-end, single-user real-time operating system for the full line of Digital Equipment Corporation PDP-11 16-bit computers. RT-11 was first implemented in 1970. It was widely used for real-time computin ...

and

RSX-11M RSX-11 is a discontinued family of multi-user real-time operating systems for PDP-11 computers created by Digital Equipment Corporation. In widespread use through the late 1970s and early 1980s, RSX-11 was influential in the development of later ...

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...

s that programs may call to process files and

records A record, recording or records may refer to: An item or collection of data Computing * Record (computer science), a data structure ** Record, or row (database), a set of fields in a database related to one entity ** Boot sector or boot record, ...

within files. Its file formats and procedures are similar to of those in some IBM

access methods An access method is a function of a mainframe operating system that enables access to data on disk, tape or other external devices. Access methods were present in several mainframe operating systems since the late 1950s, under a variety of nam ...

for several of its

mainframe computer A mainframe computer, informally called a mainframe or big iron, is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterpris ...

operating systems 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.

Notes

References

External links

Guide to OpenVMS File Applications

OpenVMS Record Management Services Reference Manual

{{Digital Equipment Corporation OpenVMS software Digital Equipment Corporation