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Distributed Transactions at Scale in Amazon DynamoDB (2023)
This paper appeared in July at USENIX ATC 2023. If you haven't read about the architecture and operation of DynamoDB, please first read my s...
In the prepare phase of the protocol, the transaction coordinator sends a message to the primary storage nodes for the items being written. In its response to the transaction coordinator, the storage node not only returns the item's value but also its current committed log sequence number (LSN). Recent prime day stats shows that DynamoDB served at peak 126 million requests per second with single digit millisecond latency and high availability.
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