GENERIC REPOSITORY AND SEARCH ENGINE FOR LHC EQUIPMENT TEST DATA
M.J. Peryt, F. Momal · CERN Document Server (European Organization for Nuclear Research) · 1999
The construction of the CERN Large Hadron Collider involves an unprecedented amount of equipment testing.Very large volumes of data are taken by various data acquisition and SCADA systems and stored in plain files, in many formats and in diverse locations.Without appropriate tools, the domain experts have to put a lot of effort into locating the right information.Most of the time they have to transform data by hand in order to be able to analyze it with their favorite software tools.We have developed a data storage framework addressing those issues.Data coming from various sources before their insertion into the repository are transformed to conform with an optimized, generic and open data model.System architecture is based on a threetier paradigm to provide the separation between a storage layer and a data processing layer.Complex, user-defined queries and on-the-fly preprocessing of data are supported.Data access tools take advantage of new industry-standard technologies (WWW, Java).Thanks to this approach it is possible to access data in a platformindependent way and to plug-in the data access functionality into widely used software tools (spreadsheets, scientific toolkits).