Author: Vijayan, K.
Paper Title Page
MOPKN006 Algorithms and Data Structures for the EPICS Channel Archiver 94
  • J. Rowland, M.T. Heron, M.A. Leech, S.J. Singleton, K. Vijayan
    Diamond, Oxfordshire, United Kingdom
  Diamond Light Source records 3GB of process data per day and has a 15TB archive on line with the EPICS Channel Archiver. This paper describes recent modifications to the software to improve performance and usability. The file-size limit on the R-Tree index has been removed, allowing all archived data to be searchable from one index. A decimation system works directly on compressed archives from a backup server and produces multi-rate reduced data with minimum and maximum values to support time efficient summary reporting and range queries. The XMLRPC interface has been extended to provide binary data transfer to clients needing large amounts of raw data.  
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