Marmotta

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