Improvement in MFTF data base system response times

Conference · Sun Nov 27 23:00:00 EST 1983

OSTI ID:7091669

Lang, N C; Nelson, B C

The Supervisory Control and Diagnostic System for the Mirror Fusion Test Facility (MFTF) has been designed as an event driven system. To this end we have designed a data base notification facility in which a task can request that it be loaded and started whenever an element in the data base is changed beyond some user defined range. Our initial implementation of the notify facility exhibited marginal response times whenever a data base table with a large number of outstanding notifies was written into. In this paper we discuss the sources of the slow response and describe in detail a new structure for the list of notifies which minimizes search time resulting in significantly faster response.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7091669
• Report Number(s): UCRL-89207; CONF-831203-146; ON: DE84012590
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700200* -- Fusion Energy-- Fusion Power Plant Technology
CONTROL
DATA ACQUISITION SYSTEMS
DATA PROCESSING
MAGNETIC MIRRORS
MFTF DEVICES
OPEN PLASMA DEVICES
OPERATION
PERFORMANCE
PROCESSING
THERMONUCLEAR DEVICES