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When moving data between two S3 locations using the AWS CLI, for example:

aws s3 mv s3://bucket/prefix s3://bucket/other-prefix

Is the data downloaded to your local computer and then re-uploaded? Or does it stay in the data center? Is it different for cp vs mv, or if moving data between buckets in different regions/azs?

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  • The way to work this out is to put a 1GB file into S3 and move it, watching your network usage while it executes. Once you do that please answer your question below.
    – Tim
    Nov 17, 2022 at 18:05
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    It seems the answer to such a basic question would be easy to find in AWS documentation, but in my searching I have not found it.
    – Martin_W
    Jul 10 at 3:10

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Did some testing into s3 as mentioned by @tim and after monitoring network usage, I determined that the answer is no, data is not moved across your local network

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