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DynamoDB

  • Serverless noSQL Database from AWS.
  • Provides Eventual Consistency
  • Divides data into partitions
  • Each partition has a primary node (writer) and can have N Reader nodes
  • A router decides to each primary node to send the request

Global tables​

  • Feature to put data closer to the users of one or more regions

Indexes​

There are two type:

  • Local secondary index (LSI)

  • Global secondary index (GSI)

  • Local indexes allow for strong consistency while global ones don't

  • For global indexes a separate partition infra is set

  • For the GSI a separate replication queue receives the requests, separate from the primary nodes, and updates the indexes eventually