Lionel Sambuc
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The use of the environment to pass the datasets to index was a quick workaround.
2.1 KiB
Mercator Indexer
Small tool to generate indexes for the Mercator Spatial Index service.
Mercator: Spatial Index
Mercator is a spatial volumetric index for the Human Brain Project. It is a component of the Knowledge Graph service, which provides the spatial anchoring for the metadata registered as well as processes the volumetric queries.
It is build on top of the Iron Sea database toolkit.
Iron Sea: Database Toolkit
Iron Sea provides a set of database engine bricks, which can be combined and applied on arbitrary data structures.
Unlike a traditional database, it does not assume a specific physical structure for the tables nor the records, but relies on the developper to provide a set of extractor functions which are used by the specific indices provided.
This enables the index implementations to be agnostic from the underlying data structure, and re-used.
Requirements
Software
Quick start
Checkout the dependencies in the parent folder:
- mercator_db
- ironsea_index
- ironsea_store
- ironsea_table
- ironsea_index_hashmap
- ironsea_index_sfc_dbc
- ironsea_table_vector
For 3 datasets, setA, setB, setC, the following files are expected to be in the current folder:
- setA:
- setA.objects.json
- setA.spaces.json
- setB:
- setB.objects.json
- setB.spaces.json
- setC:
- setC.objects.json
- setC.spaces.json
Run (and build if necessary) the indexer:
cargo run --release -- setA, setB, setC
This will produce the following files:
- setA
- setA.objects.bin
- setA.spaces.bin
- setA.index
- setB
- setB.objects.bin
- setB.spaces.bin
- setB.index
- setC
- setC.objects.bin
- setC.spaces.bin
- setC.index
Acknowledgements
This open source software code was developed in part or in whole in the Human Brain Project, funded from the European Union’s Horizon 2020 Framework Programme for Research and Innovation under the Specific Grant Agreement No. 785907 (Human Brain Project SGA2).