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| Paper: |
Towards Dynamic Catalogues |
| Volume: |
461, Astronomical Data Analysis Software and Systems XXI |
| Page: |
757 |
| Authors: |
Scheers, B.; Groffen, F.; the TKP Team |
| Abstract: |
The International LOFAR Telescope is designed
to carry out unique science in the
spatial, spectral, polarisation and temporal domains.
The Transients Key Science Project aims to study all
transient and variable sources detected by LOFAR.
One of its products will be an up-to-date catalogue of
all sources detected by LOFAR,
i.e. a spectral light-curve database,
with real-time capabilities,
and expected to grow gradually with 50–100 TB/yr.
The response time to transient and variable events depends
strongly on the query execution plans of the algorithms
that search the LOFAR light-curve database
for previous (non-)detections in the spatial, spectral, polarisation and temporal domains.
Here we show how the Transients Key Science Project
of LOFAR approaches these challenges by using column-stores,
sharded databases and implementing the new array query language
SciQL (pronounced as ‘cycle’). |
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