Amazon DynamoDB Accelerator (DAX)

Caching service purpose-built for DynamoDB compatibility
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Why DynamoDB Accelerator?

Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available caching service built for Amazon DynamoDB. DAX delivers up to a 10 times performance improvement—from milliseconds to microseconds—even at millions of requests per second. DAX does all the heavy lifting required to add in-memory acceleration to your DynamoDB tables, without requiring developers to manage cache invalidation, data population, or cluster management. As DAX is compatible with existing DynamoDB API calls, no application logic modification is required. Similar to DynamoDB, you only pay for the capacity you provision. You can focus on building great applications for your customers without worrying about performance at scale.

Benefits of DynamoDB Accelerator

Extreme performance

Take performance to the next level with response times in microseconds for millions of requests per second for read-heavy workloads. With DAX, your apps remain fast and responsive even when an event drives unprecedented request volumes.

Highly scalable

Scale on demand with DAX without any sacrifice on performance. You can start with a three-node DAX cluster, and then add capacity by adding additional nodes up to a 10-node cluster giving you millions of requests per second.

Fully managed

Automate many administrative tasks - failure detection and recovery, software patching, hardware or software provisioning, operating a distributed cache cluster, and more - with DAX as you scale.

Ease of use

Start quickly as DAX is API-compatible with DynamoDB requiring no application code changes. You have flexibility to provision one DAX cluster for multiple DynamoDB tables, multiple DAX clusters for a single DynamoDB table, and more.

Secure

Gain enhanced security with encryption at rest and in-transit and private VPC endpoints. DAX integrations with Amazon IAM, Amazon CloudWatch, and AWS CloudTrail providing you the ability to control user access and observability.

How it works

DAX is designed to run within an Amazon Virtual Private Cloud (Amazon VPC) environment. Amazon VPC defines a virtual network that closely resembles a traditional data center. With a VPC, you have control over its IP address range, subnets, routing tables, network gateways, and security settings. You can launch a DAX cluster in your virtual network and control access to the cluster by using Amazon VPC security groups. 

The diagram to the right shows a high-level overview of DAX.