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Comment by pudo | Hacker News Reader

The promises they make are really tempting. However, when I experimented with Blazegraph last year, it ended up stuck more often than I could count, whether during bulk import or in answering some ad-hoc SPARQL queries.

I can imagine that with extensive tuning, BlazeGraph provides a good database. Just don't expect it to have the polish and convenience of a modern RDBMS or a shiny NoSQL store :)

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WikiData selected BlazeGraph to back its new Query Service:

https://lists.wikimedia.org/pipermail/wikidata-tech/2015-Mar...

Here's a spreadsheet showing WikiData's evaluation of each candidate graph database:

https://docs.google.com/spreadsheets/d/1MXikljoSUVP77w7JKf9E...

I just had a look at some of the urls in your profile. http://proof.social/ and http://whybase.com/ are down or dead but sounded interesting.

Their selection "process"[1] was.. not what I'd choose to use, especially since they changed the priorities as they evaluated. But then they abandoned that process[2] so I wouldn't read too much into the evaluation.

Basically as far as I can see, the main reason BlazeGraph was chosen was this: [they] had me out to their office (a house an hour and half from mine)[3]

I'm sure BlazeGraph is fine. We were doing a very similar evaluation at the same time, and the Titan situation screwed us over too. But we took a look at BlazeGraph after Wikidata chose it, and found it pretty rudimentary at that time.

[1] https://phabricator.wikimedia.org/T90101

[2] "As you can also see we didn't finish filling them all out. But we've still pretty much settled on BlazeGraph anyway. Let me first explain what BlazeGraph is and then defend our decision to stop spreadsheet work" https://lists.wikimedia.org/pipermail/wikidata-tech/2015-Mar...

[3] https://lists.wikimedia.org/pipermail/wikidata-tech/2015-Mar...

We've definitely been working on improving the ease of getting started. The number of configuration options is a strength and a challenge.

There's now an updated user's guide on the wiki: https://wiki.blazegraph.com/wiki/index.php/Main_Page

and additional code samples: https://github.com/blazegraph/blazegraph-samples/

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