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Google Doc: <If the design in question is unclear or needs to be discussed and reviewed, a Google Doc can be used first to facilitate comments from others.>

Motivation

Describe the problems you are trying to solveCloud object storage is cheaper than multi replication local storage, thus we can put cold data to s3 to store much more data at lower price.  To be more general, doris should not lose any feature due to putting cold data to s3.

Related Research

some research related to the function, such as the advantages and disadvantages of the design, related considerations, etc.

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