Cayley – An open-source graph database

Re:Cayley – An open-source graph database by jmlvanre on Wednesday June 25, 2014 @07:23PM (#7947320)

I agree with the idea that tables are just strict graphs and as such a graph database is usually capable of substituting a relational database. I think many graph DBs lack a sophisticated enough query language to bridge that gap. At Orly (https://github.com/orlyatomics/orly) we're working on a powerful query language, and it's nice to see that Cayley is doing the same.

> querying from two different databases is going to slow down my responses

I think querying 2 different systems tends to be slower, but more importantly you lose transactionality. If you can use a single system that is at least on-par with your relational system for your run of the mill data and have a very powerful graph then that's a big win.

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Re:Cayley – An open-source graph database by ghein on Wednesday June 25, 2014 @08:34PM (#7947543)

I work on a graph focused firm, XN Logic, where we use an unhydrated graph to store and analyze the relations, the appropriate store for large volumes of information, and Datomic to store mutations for the graph for history analysis.

We use the PACER engine (https://github.com/pangloss/pacer ) to power queries.

This approach allows you to get the optimal performance and only reaching out to other systems when needed.

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