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A comment on Thinking in Datomic. Parent comment

Re:Thinking in Datomic by beagle3 on Sunday July 08, 2012 @08:44PM (#4216197)
kdb+ is head and shoulders about the rest when it comes to introducing time / order into relational data. It's lean, minimalistic and ridiculously fast.

Unfortunately, it is also ridiculously expensive.

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Re:Thinking in Datomic by sbmassey on Sunday July 08, 2012 @10:39PM (#4216436)
It's also easy to bring to its knees with seemingly innocent queries, and has a pretty darn opaque programmable interface in Q. (OK, the vaguely SQL-like stuff is not too hard, once you understand the differences from normal SQL, but doing anything lower level than that is awesome/crazy)
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