| Title |
Palantiri: A Distributed Real-Time Database System for Process Control |
| Authors |
- B.J. Tummers, W. Heubers
NIKHEF-K, Amsterdam, The Netherlands
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| Abstract |
The medium-energy accelerator MEA, located in Amsterdam, is controlled by a heterogeneous computer network. A large real-time database contains the parameters involved in the control of the accelerator and the experiments. This database system was implemented about ten years ago and has since been extended several times. In response to increased needs the database system has been redesigned. The new database environment, as described in this paper, consists out of two new concepts: (1) A Palantir which is a per machine process that stores the locally declared data and forwards au non local requests for data access to the appropriate machine. It acts as a storage device for data and a looking glass upon the world. (2) Golems: working units that define the data within the Palantir, and that have knowledge of the hardware they control. Applications access the data of a Golem by name (which do resemble Unix path names). The Palantir that runs on the same machine as the application handles the distribution of access requests. This paper focuses on the Palantir concept as a distributed data storage and event handling device for process control.
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| Paper |
download S09DPP02.PDF [0.162 MB / 4 pages] |
| Cite |
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| Conference |
ICALEPCS1991 |
| Series |
International Conference on Accelerator and Large Experimental Physics Control Systems (3rd) |
| Location |
Tsukuba, Japan |
| Date |
11-15 November 1991 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Cheol-on Pak (KEK, Tsukuba, Japan); Shin-ichi Kurokawa (KEK, Tsukuba, Japan); Tadahiko Katoh (KEK, Tsukuba, Japan); Kazuro Furukawa (KEK, Tsukuba, Japan); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-254-7 |
| Online ISSN |
2226-0358 |
| Received |
11 November 1991 |
| Accepted |
20 November 1991 |
| Issued |
04 December 1992 |
| DOI |
doi:10.18429/JACoW-ICALEPCS1991-S09DPP02 |
| Pages |
336-339 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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