Uber migrated all its payment transaction data from DynamoDB and blob storage into a new long-term solution, a purpose-built data store named LedgerStore. The company was looking for cost savings and had previously reduced the use of DynamoDB to store hot data (12 weeks old). The move resulted in significant savings and simplified the storage architecture. Uber built Gulfstream, its payment platform, in 2017 and used DynamoDB for storage. Due to rising storage costs, DynamoDB was used only for t...