In case you don't feel like clicking through to gumroad and opening the sample PDF...

https://docs.amazonaws.cn/en_us/amazondynamodb/latest/develo...

Here is a link to the AWS docs referencing the limitation of local secondary indices. Any table with a local secondary index is limited to 10GB per partition key.

The authors may have misinterpreted this limitation.

>Once you create a local index on a table, the property that allows a table to keep growing indefinitely goes away.

It limits the value for that partition key but does not limit the overall size of the table...

The entire chapter on DynanoDB is free in the sample. The answer to your question is there: https://gumroad.com/l/aws-good-parts