EPJ Web Conf.
Volume 245, 202024th International Conference on Computing in High Energy and Nuclear Physics (CHEP 2019)
|Number of page(s)||8|
|Section||4 - Data Organisation, Management and Access|
|Published online||16 November 2020|
CDFS: A high-efficiency Data Access System for Storage Federations
Institute of High Energy Physics, CAS, 100049 Beijing, China
2 University of Chinese Academy of Sciences, 100049 Beijing, China
3 Tianfu Cosmic Ray Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, 610041 Chengdu, China
* Corresponding author: firstname.lastname@example.org
Published online: 16 November 2020
High energy physics (HEP) experiments, such as LHAASO, produce a large amount of data, which is usually stored and processed on distributed sites. Nowadays, the distributed data management system faces some challenges such as global file namespace, efficient data access and storage. Focusing on those problems, this paper proposed a cross-domain data access file system (CDFS), applying data deduplication and compression as the storage-optimized engine, aiming at dynamically building an aggregate view of multiple distributed storages and accessing data in a fast and efficient way. The test based on the raw data of LHAASO experiment showed that the CDFS could present a unique repository based on distributed sites in LHAASO. And the storage-optimized engine reduces the storage consumption of the raw data by more than 50%.
© The Authors, published by EDP Sciences, 2020
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