All,I stumbled upon a Wikidata Scalability blog post by Magnus Manske (cc'd in on this message) [1] that contains the following excerpt:
"One of theproposed alternatives <https://commons.wikimedia.org/wiki/File:WDQS_Backend_Alternatives_working_paper.pdf>to blazegraph is Virtuoso. It models the graph structure of Wikidata in MySQL. Even before I read about that, I had a similar thought. But unlike Virtuoso, which is a general solution, Wikidata is a special case, with optimization potential. So I went to do a bit of tinkering. The following was done in the last few days, so it’s not exactly pretty, but initial results are promising."
That's incorrect. Virtuoso is a multi-model DBMS with its own SQL and RDF engines that have nothing to do with MySQL.
Magnus:Uniprot hosts 100 Billion+ triples, accessed 24/7 globally, handling unpredictable query complexity and solution size unpredictability using a single-server instance of the open source edition of Virtuoso. The same applies to a vast majority of nodes in the massive LOD Cloud.
Scalability has never been a Virtuoso issue since the very inception of the LOD Cloud bootstrapped by DBpedia (yet another Virtuoso instance).
Links: [1] http://magnusmanske.de/wordpress/?p=691 -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Home Page:http://www.openlinksw.com Community Support:https://community.openlinksw.com Weblogs (Blogs): Company Blog:https://medium.com/openlink-software-blog Virtuoso Blog:https://medium.com/virtuoso-blog Data Access Drivers Blog:https://medium.com/openlink-odbc-jdbc-ado-net-data-access-drivers Personal Weblogs (Blogs): Medium Blog:https://medium.com/@kidehen Legacy Blogs:http://www.openlinksw.com/blog/~kidehen/ http://kidehen.blogspot.com Profile Pages: Pinterest:https://www.pinterest.com/kidehen/ Quora:https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter:https://twitter.com/kidehen Google+:https://plus.google.com/+KingsleyIdehen/about LinkedIn:http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal:http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i :http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
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