Cayley

Datetime:2016-08-23 00:47:47          Topic: Leveldb           Share

Cayley – An open-source graph database

From the webpage:

Cayley is an open-source graph inspired by the graph database behind Freebase and Google’s Knowledge Graph .

Its goal is to be a part of the developer’s toolbox where Linked Data and graph-shaped data (semantic webs, social networks, etc) in general are concerned.

Features

  • Written in Go
  • Easy to get running (3 or 4 commands, below)
  • RESTful API
    • or a REPL if you prefer
  • Built-in query editor and visualizer
  • Multiple query languages:
    • Javascript, with a Gremlin -inspired* graph object.
    • (simplified) MQL , for Freebase fans
  • Plays well with multiple backend stores:
  • Modular design; easy to extend with new languages and backends
  • Good test coverage
  • Speed, where possible.

Rough performance testing shows that, on consumer hardware and an average disk, 134m triples in LevelDB is no problem and a multi-hop intersection query — films starring X and Y — takes ~150ms.

If you are seriously thinking about a graph database, see also these comments . Not everything you need to know but useful comments none the less.

I first saw this in a tweet from Hacker News .





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