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knowledge/DynamoDB.md
Marco D'Agostini e1c4383801 new: DynamoDB
2020-07-28 20:36:56 -05:00

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DynamoDB

It's a NoSQL Database from AWS

Differences from SQL Database

  • Records of a table can have different fields
  • Tables can be partitioned using partition keys, I think you cannot query fast across different partitions. I think an analogy to partition keys would be like having a table across multiple databases in SQL Databases
  • Tables also have sort keys, this determines how records are ordered, and you can only query contiguous records, I think you cannot filter nor change the order (maybe only reverse the default order)
  • So basically partition keys and sort keys determines how the table can be queried. This limitations is the tradeoff that makes DynamoDB fast.
  • There are some improvements with the connection management, I think it allows a lot more concurrent connections, but I don't know the details.

Use cases

  • High scalability
  • Better integration with serverless architecture, because of better connection management

What led to learning this