Storage & Databases

DAX

AWS DynamoDB Accelerator — an in-memory cache in front of DynamoDB.

In plain terms

Sub-millisecond reads. Pattern transferable: every fast KV store benefits from a memory tier.

Origin

AWS launched DynamoDB Accelerator (DAX) in 2017. The pattern — in-memory cache transparent to the application — is generic; DAX is the managed AWS-shape implementation.

Where it shows up in production

DynamoDB workloads Same API, sub-millisecond reads at 10× the cost of DynamoDB direct.

Sources & further reading

Docs AWS — DynamoDB Accelerator docs

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