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Marmotta

    Marmotta

    Sept 13, 2016

    DPLA uses the Linked Data Platform (LDP) standard to manage harvested content and metadata. Our LDP server and RDF repository runs on Apache Marmotta, backed by a PostgreSQL database.  Broadly, we handle two kinds of resources through LDP: DPLA MAP records (as LDP RDF Sources with type ORE::Aggregation), and binary "Original Records" (as LDP non-RDF Sources).

    • Creating a differently-ordered index on `triples`
    • Generic Query Plans in PSQL 9.1
    • Various PostgreSQL changes (not covered elsewhere herein)
    • LDP Interactions Overview
    • Amazon EC2 adjustments
    • Addressing slow updates and inserts
    • Why table partitioning will not be beneficial
    • Using irqbalance and SMP IRQ affinity
    • Index performance with high context counts

    See also KriKri RDF Database Review

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    Tech
    • Product requirements
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    • Documentation
    • Projects
      • Contributing to DPLA Projects
      • Educational Uses Projects
      • Ingestion System
        • Geocoding Enrichment Notes
        • Ingestion 2
          • Frequently-Asked Questions (FAQ)
          • Krikri
          • Heidrun
          • HOWTOs
          • Architecture
          • Enrichment Profiles
          • Error Classes and Messaging Requirements
          • Ingestion2 Requirements
          • Ingestion2 Roadmap
          • Metadata Mapping DSL
          • Metadata Provenance
          • Post-Enrichment Outcomes (Indexing)
          • Profiling memory growth and execution time
          • Marmotta
            • LDP Interactions Overview
            • Index performance with high context counts
            • Why table partitioning will not be beneficial
            • Addressing slow updates and inserts
            • Various PostgreSQL changes (not covered elsewhere herein)
            • Amazon EC2 adjustments
            • Using irqbalance and SMP IRQ affinity
            • Generic Query Plans in PSQL 9.1
            • Creating a differently-ordered index on `triples`
          • Queue-based Entity URI Iterators
          • Product requirements
        • Ingestion 3
      • Infrastructure and DevOps
      • The DPLA API
    • DPLA Hydra Contributions
    • Contributing Metadata Files to DPLA
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