Lab
A Cloud Guru

Implementing DAX on an Existing DynamoDB Solution

In this lab, we are presented with a site that is struggling under load because the backing DynamoDB table has had its Read and Write provisioning drastically reduced to avoid incurring significant cost. To correct this, we will provision a DynamoDB Accelerator (DAX) cluster and modify the Lambda functions in the site architecture to implement caching to return the site to a functional state.

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Path Info

Level

Intermediate

Duration

30m

Published

Nov 22, 2019

Challenge

Launch a DynamoDB Accelerator (DAX) Cluster
1. Navigate to DynamoDB.
2. Click Dashboard in the left-hand menu.
3. Click Create cluster.
4. Set the following values:
  - Cluster name: tatourneycache
  - Node type: dax.t2.small
  - Cluster size: 1
  - IAM Service role for DynamoDB access: Create new
    
    IAM role name: DAXtoDynamoDB
    
    IAM policy name: DAXtoDynamoDBPolicy
    
    IAM role policy: Read/Write
    
    Target DynamoDB table: TaTourneyStats
  - Subnet group: Create new
    
    Name: tatourney
    
    VPC: Select the provided VPC
    
    Subnets: Check both subnets listed
  - Security group: default (not the cfst- one)
5. Click Launch cluster.
Challenge

Modify `getTaStats` Lambda Function
1. Navigate to the Lambda service.
2. Select the function with getTaStats in the name.
3. Modify the function to utilize the DAX client in place of the Boto3 DynamoDB client.
Note: If you're not comfortable editing code, a modified version of this function is available at the GitHub link on the lab page.
Challenge

Modify `taStreamProcessor` Lambda Function
1. Navigate to the Lambda service.
2. Select the function with taStreamProcessor in the name.
3. Modify the function to replace the Boto3 DynamoDB client with the DAX client.
Note: If you're not comfortable editing code, a modified version of this function is available at the GitHub link on the lab page.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.