TY  - JOUR
AU  - Manzano, C.
AU  - Miskolczi, A.
AU  - Stiele, H.
AU  - Vybornov, V.
AU  - Fieseler, T.
AU  - Pfalzner, S.
TI  - Learning from the present for the future: The Jülich LOFAR Long-term Archive
JO  - Astronomy and computing
VL  - 48
SN  - 2213-1337
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2024-03724
SP  - 100835 -
PY  - 2024
AB  - The Forschungszentrum Jülich has been hosting the German part of the LOFAR archive since 2013. It is Germany’s most extensive radio astronomy archive, currently storing nearly 22 petabytes (PB) of data. Future radio telescopes are expected to require a dramatic increase in long-term data storage. Here, we take stock of the current data management of the Jülich LOFAR Data Archive, describe the ingestion, the storage system, the export to the long-term archive, and the request chain. We analysed the data availability over the last 10 years and searched for the underlying data access pattern and the energy consumption of the process. We determine hardware-related limiting factors, such as network bandwidth and cache pool availability and performance, and software aspects, e.g. workflow adjustment and parameter tuning, as the main data storage bottlenecks. By contrast, the challenge in providing the data from the archive for the users lies in retrieving the data from the tape archive and staging them. Building on this analysis, we suggest how to avoid/mitigate these problems in the future and define the requirements for future even more extensive long-term data archives.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001250562200001
DO  - DOI:10.1016/j.ascom.2024.100835
UR  - https://juser.fz-juelich.de/record/1027280
ER  -