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| Paper: |
Towards a Self-healing Archive |
| Volume: |
521, Astronomical Data Analysis Software and Systems XXVI |
| Page: |
16 |
| Authors: |
Witz, S.; Lyons, D. K.; Plank, J.; Hausman, C.; Lively, R.; Arora, J.; Benson, J. |
| Abstract: |
The new NRAO Archive encompasses data from the Jansky VLA, the
legacy VLA, the Green Bank Telescope and the VLBA while additionally
providing access to ALMA data stored and managed separately.
Astronomical data is generally self-describing and generated
independently by each instrument. The archive database contains
metadata extracted and maintained centrally. Errors in metadata
generation and extraction are unavoidable, but after fixing the bug,
how do you correct the data? This paper introduces a self-healing
approach that leverages otherwise idle archive storage nodes by
having them continuously reingest stored metadata with the latest
software. Upon detecting a difference, the reingestion system can
make decisions about whether to update incorrect records in the
searchable metadata database. |
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