Speaker
Description
ITER’s CODAC archiving system manages currently three different sets of data: DAN, SDN and PON, that correspond with the data that is transmitted by different networks: Data Archiving Network (data produced by data acquisition, diagnostics and data analysis), Synchronous Data Network (real time control network), and Plan Operational Network (control data). In this sense, ITER’s CODAC data archiving system needs to manage a wide variety of types of data. In some cases, the structure of this information is very simple and can be defined with a primitive type, such as float, double or integer, but in many other cases type structures are much complex, and data model has to manage multidimensionality with dynamic dimension sizes, metadata embedded types with header and footer sections, or user defined composition of types.
ITER is a big project that involves many different developers and integrators. Data model technology must be flexible enough to cover almost all their necessities. Additionally, one of the main requirements for ITER arching system is data accessibility. Archived data must support long-term archiving independently on ITER systems evolution, and backward data compatibility must be guaranteed. This important requirement mostly relays in a robust and standard data model implementation that avoids opaque sections.
The aim of this work is to present the data model in ITER’s CODAC data archiving system. It includes detailed description of the design and main clues of its implementation in all its phases: data acquisition, data archiving, data retrieval and user presentation.
