That could also very well be about CouchDB which implemented indexes/views as Ma... | Hacker News

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		rubiquity on Nov 20, 2024 \| parent \| context \| favorite \| on: Open Riak – open, modern Riak fork That could also very well be about CouchDB which implemented indexes/views as MapReduce functions.

senderista on Nov 20, 2024 [–]

Back in the day we had a CouchDB MapReduce view (on Cloudant) which took a full month to rebuild (while an angry customer was waiting). The I/O inefficiency was absolutely off the charts.

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