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Kicked off @AWSreInvent 2019 by attending @houlihan_rick’s @DynamoDB modeling session. As expected, it was a 60 minute firehose of #NoSQL knowledge bombs. There was *A LOT* to take away from this, but here are some really interesting lessons that stuck out to me. #reInvent 
DynamoDB performance gets BETTER with scale. Yup, you read that correctly, the busier it gets, the faster it gets. This is because, eventually, every event router in the fleet caches your information and doesn’t need to look up where your storage nodes are.
Big documents are a bad idea! It’s better to split data into multiple items that (if possible) are less than 1 WCU. This will be a lot cheaper and cost you less to read and write items. You can join the data with a single query on the partition key.
