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Comment on Show HN: s3-lambda – Lambda functions over S3 objects: each, map, reduce, filterparent

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Wow, you get a CSV file of all the objects. That's a solution I did not expect.

Sounds a bit like something they cooked up in a hurry to avoid having to design a BigQuery-type service for querying arbitrary metadata; I bet they had some huge customer with a need to get a CSV file for a bucket, that were willing to effectively bankroll the development of this feature.

But yes. That would sidestep the issue. You'd still have to turn on the feature and wait for the CSV file to build (apparently the best granularity is daily), of course, but it would help tremendously. Wish that had existed when we had our difficulties, about a year ago.

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