MICE data handling on the Grid

20th International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

Martyniak, J.^1

Imperial College London, Blackett Laboratory, London

SW7 2BW, United Kingdom^1

关键词: File transfers;    Internal integrity;    Muon colliders;    Neutrino factories;    Raw data files;    Reconstruction process;    Rutherford Appleton Laboratory , UK;    Storage elements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/3/032063/pdf
DOI  :  10.1088/1742-6596/513/3/032063

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The international Muon Ionisation Cooling Experiment (MICE) is designed to demonstrate the principle of muon ionisation cooling for the first time, for application to a future Neutrino factory or Muon Collider. The experiment is currently under construction at the ISIS synchrotron at the Rutherford Appleton Laboratory (RAL), UK. In this paper we present a system-the Raw Data Mover, which allows us to store and distribute MICE raw data-and a framework for offline reconstruction and data management. The aim of the Raw Data Mover is to upload raw data files onto a safe tape storage as soon as the data have been written out by the DAQ system and marked as ready to be uploaded. Internal integrity of the files is verified and they are uploaded to the RAL Tier-1 Castor Storage Element (SE) and placed on two tapes for redundancy. We also make another copy at a separate disk-based SE at this stage to make it easier for users to access data quickly. Both copies are check-summed and the replicas are registered with an instance of the LCG File Catalog (LFC). On success a record with basic file properties is added to the MICE Metadata DB. The reconstruction process is triggered by new raw data records filled in by the mover system described above. Off-line reconstruction jobs for new raw files are submitted to RAL Tier-1 and the output is stored on tape. Batch reprocessing is done at multiple MICE enabled Grid sites and output files are shipped to central tape or disk storage at RAL using a custom File Transfer Controller.