# Open source Pregel+Dgraph implementations?

**URL:** <https://discuss.dgraph.io/t/open-source-pregel-dgraph-implementations/4583>\
**Category:** Misc\
**Created:** [June 6, 2019, 5:13pm UTC](https://discuss.dgraph.io/t/open-source-pregel-dgraph-implementations/4583 "2019-06-06T17:13:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vevawu](https://avatars.discourse-cdn.com/v4/letter/v/d6d6ee/32.png) [@vevawu](https://discuss.dgraph.io/u/vevawu)\
**Post date:** [June 6, 2019, 5:13pm UTC](https://discuss.dgraph.io/t/open-source-pregel-dgraph-implementations/4583/1 "2019-06-06T17:13:25Z")

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On the database comparison page[0], Pregel is described as something that can be run along side DGraph to perform certain heavy operations, presumably in batches or crons. Is there an existing open source Pregel implementation that already uses Dgraph? I’ve searched but haven’t found one, but I’m not sure if there’s another term I should be using (something other than “pregel”).

I’m working on a greenfield project and am evaluating options for working with large graphs. I’m considering Spark GraphX[1] but I’d like to see if there are other options before I go about implementing the Dgraph\<-\>Spark bridge.

[0] [https://docs.dgraph.io/dgraph-compared-to-other-databases/](https://docs.dgraph.io/dgraph-compared-to-other-databases/)  
[1] [GraphX - Spark 3.1.1 Documentation](https://spark.apache.org/docs/latest/graphx-programming-guide.html#pregel-api)

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**Author:** ![system](https://canada1.discourse-cdn.com/flex007/uploads/dgraph/original/2X/2/2b38fdece2abe5814f2e51bee69d1e67fc304b0a.png) [@system](https://discuss.dgraph.io/u/system)\
**Post date:** [July 18, 2019, 9:13am UTC](https://discuss.dgraph.io/t/open-source-pregel-dgraph-implementations/4583/2 "2019-07-18T09:13:26Z")

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