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25 lines
1.1 KiB
Markdown
25 lines
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Markdown
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# Graph database
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## Abstraction: graph
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[Source: Graph database](https://en.wikipedia.org/wiki/File:GraphDatabase_PropertyGraph.png)
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In a graph database, each node is a record and each arc is a relationship between two nodes. Graph databases are optimized to represent complex relationships with many foreign keys or many-to-many relationships.
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Graphs databases offer high performance for data models with complex relationships, such as a social network. They are relatively new and are not yet widely-used; it might be more difficult to find development tools and resources. Many graphs can only be accessed with [REST APIs](https://github.com/donnemartin/system-design-primer#representational-state-transfer-rest) .
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## Source(s) and further reading: graph
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- [Graph database](https://en.wikipedia.org/wiki/Graph_database)
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- [Neo4j](https://neo4j.com/)
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- [FlockDB](https://blog.twitter.com/2010/introducing-flockdb) |