Smalyshev added a comment.

Technically, it is possible to keep both datasets in the same DB. We will have to think about though:

  1. Namespacing:
    1. Will it have the same same ontology? Probably yes.
    2. Will it have the same prefixes? Probably not. Will have to account for that.
  2. Updates - we'll need separate updater
  3. Dump reload - how we can reload dump for Commons without wiping data for Wikidata?

There are a number of ways to have separation in Blazegraph:

  • Namespaces - those seem to be completely disjoint. Cross-querying may be possible via federation, but may be tricky.
  • Graphs - these live in the same namespace, and can be cross-queried, but probably will require some changes so old queries still work, and also probably running Blazegraph in quads mode which may have some restrictions.

TASK DETAIL
https://phabricator.wikimedia.org/T141602

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To: Smalyshev
Cc: Bugreporter, Lydia_Pintscher, Aklapper, Steinsplitter, Pokefan95, Smalyshev, D3r1ck01, Izno, Wikidata-bugs, aude, El_Grafo, Ricordisamoa, Fabrice_Florin, Mbch331, Tgr
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