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This is pretty much straight from the DynamoDB best practices. Offload infrequently accessed data (think time series data from previous months) to S3 and use another tool to query it.

https://docs.aws.amazon.com/amazondynamodb/latest/developerg...

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+1 Everything I've learned the hard way with DynamoDB was in the Best Practices documentation the whole time.

Now I've learned to read the Best Practices section of any AWS service before I start implementing. It saves a lot of heartache

In RDBMS world, this is very similar to partitioning large tables by date - moving window pattern. Drop the older partitions outside of the window.

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