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There is no such setting in S3 by default, any features like this would be managed by a client. By default, uploads for an object with the same name and key of an existing object to a bucket that is versioned will result in a new version of the object being uploaded. If the bucket is not version, the upload will overwrite the existing object.
By default, when you upload the file with same name. It will overwrite the existing file. In case you want to have the previous file available, you need to enable versioning in the bucket.
In case any one wants a reference, "Amazon S3 is a distributed system. If it receives multiple write requests for the same object simultaneously, it overwrites all but the last object written" https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutObject.html
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AWS 官方已更新 1 年前
Understand completely. Thank you bruggs!
This is my understanding as well, and it seems crazy to me that there is no possibility to have such a feature. When performing a manual upload in the console, getting a pop-up that another version exists before overwriting the file seems like a pretty basic need to me!