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From "Graham Wallis (JIRA)" <>
Subject [jira] [Commented] (ATLAS-1757) Proposal to update graph DB
Date Fri, 28 Apr 2017 09:20:04 GMT


Graham Wallis commented on ATLAS-1757:

There are quite a few graph databases that might be worthy of consideration. I think it is
reasonable to suggest that we limit our attention to those that have Apache-2 licensed APIs
and that include support for Tinkerpop 3.2. The latter restriction appears to eliminate ArangoDB,
OrientDB and Gaffer but leaves JanusGraph and Neo4j as candidates. JanusGraph is the more
obvious candidate as it is Apache-2 licensed throughout and (as noted in the articles linked
above) could be considered to be the reference implementation of TP3. Whilst less obvious,
Neo4j includes an Apache-2 licensed API library - neo4j-gremlin - that does not include the
GPL3-licensed implementation of neo4j. We could adopt the above as our forward-looking strategy
but I would be keen that we chip away at this - e.g. by adding JanusGraph via the graph abstraction
layer and (at some point) making it the default and deprecating the use of Titan 0 and Titan
1. Other graph databases (e.g. neo4j-gremlin) could be added via the graph abstraction layer
depending on users' requirements.

> Proposal to update graph DB
> ---------------------------
>                 Key: ATLAS-1757
>                 URL:
>             Project: Atlas
>          Issue Type: Improvement
>          Components:  atlas-core
>    Affects Versions: trunk
>            Reporter: Graham Wallis
> Given the formation of the JanusGraph open source project (under the Linux Foundation)
to continue the development and support of the Titan DB, should we aim to deprecate Titan
and move over to JanusGraph?
> If we did this, we could keep the graph abstraction layer and use it to support Titan
0, Titan 1 and JanusGraph.
> Are there other graph databases that we should consider?

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