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TY - CONF AU - Chochula, P.Ch. AU - Augustinus, A. AU - Bond, P.M. AU - Kurepin, A.N. AU - Lechman, M. AU - LÃ¥ng, J.L. AU - Pinazza, O. ED - Schaa, Volker RW TI - Challenges of the ALICE Detector Control System for the LHC RUN3 J2 - Proc. of ICALEPCS2017, Barcelona, Spain, 8-13 October 2017 C1 - Barcelona, Spain T2 - International Conference on Accelerator and Large Experimental Control Systems T3 - 16 LA - english AB - The ALICE Detector Control System (DCS) provides its services to the experiment for 10 years. It ensures uninterrupted operation of the experiment and guarantees stable conditions for the data taking. The decision to extend the lifetime of the experiment requires the redesign of the DCS data flow. The interaction rates of the LHC in ALICE during the RUN3 period will increase by a factor of 100. The detector readout will be upgraded and it will provide 3.4TBytes/s of data, carried by 10 000 optical links to a first level processing farm consisting of 1 500 computer nodes and ~100 000 CPU cores. A compressed volume of 20GByte/s will be transferred to the computing GRID facilities. The detector conditions, consisting of about 100 000 parameters, acquired by the DCS need to be merged with the primary data stream and transmitted to the first level farm every 50ms. This requirement results in an increase of the DCS data publishing rate by a factor of 5000. The new system does not allow for any DCS downtime during the data taking, nor for data retrofitting. Redundancy, proactive monitoring, and improved quality checking must therefore complement the data flow redesign. PB - JACoW CP - Geneva, Switzerland SP - 323 EP - 327 KW - ion KW - detector KW - controls KW - operation KW - experiment DA - 2018/01 PY - 2018 SN - 978-3-95450-193-9 DO - 10.18429/JACoW-ICALEPCS2017-TUMPL09 UR - http://jacow.org/icalepcs2017/papers/tumpl09.pdf ER -