Accession Number:

AD0706715

Title:

THE GRAIL RING STRUCTURE AND PRIMITIVES

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CA

Report Date:

1970-04-01

Pagination or Media Count:

40.0

Abstract:

The paper gives a description of the ring-structure mechanism that controls the disposition of data and storage space in the GRAIL system. The ring structures--continuous chains of elements containing codes and either links or data--represent the logic of both the users program and of the system itself. The basic types are 1 system structure 2 files description structure 3 file structure 4 context structure and 5 plane structure. Common to the first three types is a space allocation substructure that describes the location of data sets within a particular area in secondary storage and of space available for use. Basic operations on ring structures--such as finding, procuring, and releasing elements--are performed by ring structure primitives, written as a group of remote code sequences.

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware
  • Computer Systems Management and Standards

Distribution Statement:

APPROVED FOR PUBLIC RELEASE