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Data files and their interdependences: a data base for the tokamak fusion experiment ASDEX Upgrade

机译:数据文件及其相互依赖性:托卡马克融合实验ASDEX升级的数据库

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摘要

Fusion experiments produce large amounts of raw data which must be evaluated. From these data the diagnosti- cians derive 'processed' data files in increasing 'levels' of evaluation. The processed data files can be modified several times due, for example, to recalibration or correction of errors. The re-computation of files and the invalidation of the previous versions cause consistency problems. The dependence data base (DDB) addresses this problem, which is essential for the users of experimental data. The DDB keeps track of the mutual dependences between data files. Any re-computation creates a new 'valid' version of a file and renders the previous version and all files derived from it 'invalid'. Previous versions are kept in the file system and a file history can be retrieved. The DDB works on-line, so that it is always up-to-date. The structure of the DDB and its application to ASDEX-UPgrade data are described.
机译:融合实验会产生大量必须评估的原始数据。从这些数据中,诊断人员将以不断增加的评估“水平”得出“已处理”数据文件。例如,由于重新校准或纠正错误,可以对已处理的数据文件进行多次修改。重新计算文件和先前版本的无效会导致一致性问题。依赖数据库(DDB)解决了这个问题,这对于实验数据的用户来说是必不可少的。 DDB跟踪数据文件之间的相互依赖性。任何重新计算都会创建文件的新“有效”版本,并将以前的版本以及从该版本派生的所有文件都呈现为“无效”。以前的版本保存在文件系统中,并且可以检索文件历史记录。 DDB在线运行,因此始终是最新的。描述了DDB的结构及其在ASDEX-UPgrade数据中的应用。

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