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He claims to need to delete "billions of objects": http://one.valeski.org/2010/03/amazon-s3-file-deletion-fail....

Would it be naive of me to assume that no single person/company is making up a few percentage points of all S3 objects?

I checked to see how many files we have on our main CDN (not S3 hosted, but just to get an idea), about 500 million files, there are 6 of those boxes so that's 3 billion files.

We keep three copies of each, but since S3 does that for you I think we shouldn't multiply by 3.

3 billion files is a lot of files, but it isn't that extreme, he could very well be telling the truth.

I know of at least one S3 customer that uses a small (but significant) number of S3's total published object count. I would assume that there are more customers like this one.

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