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This is the important bit. Just about every company or web app will have a bunch of relational data and therefore an SQL database of some kind. And storing key-

This is the important bit. Just about every company or web app will have a bunch of relational data and therefore an SQL database of some kind. And storing key-value pairs in an SQL database is really not that hard or inconvenient or slow or whatever - it's gonna be 'good enough' for just about everyone. Why bother supporting an entire extra dedicated KV store when the SQL DB I already have will work just fine? 'Best tool for the job' is an oversimplification.

steveklabnik 16y ago
And lots of NoSQL databases do have these kinds of value-add features. For example, FourSquare writes data into Mongo (and Postgres, as well, actually...) because it has location features built into it. http://www.mongodb.org/display/DOCS/Geospatial+Indexing http://www.mongodb.org/display/DOCS/Geospatial+Indexing