DynamoDB with fault injection testing 🚀☁️ #95
In the previous issue, Durable functions debut 🚀☁️ #94 was debut of durable functions, while we see the content on it growing even in this issue.
AWS has launched Fault Injection Service (FIS) support for DynamoDB Global Tables with Multi-Region Strong Consistency (MRSC). This allows you to intentionally inject faults into your global replication to see if your app stays standing. This update moves resilience from a theoretical “five-nines” (99.999%) promise to a verifiable reality by allowing you to simulate regional replication pauses in a controlled environment. Instead of waiting for an actual AWS outage to see how your stack behaves, you can now proactively trigger failure scenarios to observe how your application handles replication lag, validate that your New Relic dashboards or CloudWatch alarms actually fire during a crisis, and ensure your Lambda retry logic gracefully manages the disruption. By intentionally breaking the sync between regions, you can fine-tune your recovery time objectives (RTO) and confirm that your “strongly consistent” application doesn’t accidentally serve stale data or crash when the network gets messy.
⭐ Pick of the month
This month’s Pick is “Messaging queues“.
Harpreet Siddhu performs an RCA for a cost change where event source mapping was the 4 cent AWS bill which exposed the hidden cost with Serverless where a minor change requires a complete architectural review.
Jones Zachariah Noel N (author) takes on Buses and queues: Head-on comparing how Buses and Queues differ architecturally and the patterns of each service with bringing the best of them and also complimenting it together.
🚀 AWSome content to learn from
Manu Muraleedharan debunks durable functions in Lambda with the different constructs and also guideline to choose between durable functions in Lambda v/s Step Functions.
Vadym Kazulkin in the first part of the new blog series on Lambda Managed Instances talks about the feature and when to choose this over Lambda, as well as a simple guide to build one.
Engin Diri pens down how Ralpha Wiggum builds a Serverless SaaS with Pulumi, Ralpha Wiggum using Claude and AI to vibe code the app.
Michael Walmsley cracks down on durable functions encryption with ways to custom serialization/deserialization for checkpoint data - full payload encryption and field-specific encryption.
Jimmy Dahlqvist in the first part of the series on building a serverless AI bartender, focuses on the architecture with Bedrock, along with DSQL to build an EDA system.
Marcos Henrique talks about importance of throttling musings with API Gateway that guides you on API Gateway throttling v/s Redis sliding windows with a walkthrough of the code.
Davide De Sio goes on to build nevermore.dev using durable functions as LLM-as-judge pattern which breaksdown the complete architecture and how crucial LLM-as-judge pattern is needed while leveraging durable functions for the same.
⚒️ What's happening with Serverless tools, samples, and projects
Luciano Mammino has published OIDC Authorizer - Lambda authorizer.
Joey Wang and the Amplify team have built Amplify Gen1 to Gen2 migration tool.
Christopher Bateman has published which IaC.
Marko Marinovic has published AWS infrastructure as React.
🎙️ Podcasts, videos and live-streams
Nadtakan Futhoem published the Lambda Durable Functions series.
Sandro Volpicella explains how he cut Lambda cost by 90%.
On The Pragmatic Engineer, Gergely Orosz joins Mai-Lan Tomsen Bukovec to talk about how S3 is built.
On the Serverless Office Hours, Julian Wood joins Anton Aleksandrov and Ayush K for AWS Lambda tenant isolation
Uri Segev dives into Lambda Managed Instances (in Hebrew).
🗓️ Mark your calendars
Get Hands-On with Serverless workshop happening on multiple days in January and February.
AWS Community Days are happening -
ACD Rajasthan on February 28th, 2026.
ACD Ahmedabad on February 28th, 2026. CFP is currently open until January 31st, 2026.
ACD Slovakia on March 11th, 2026. CFP is currently open until February 15th, 2026.
ACD Pune on March 21st, 2026. CFP is currently open until February 8th, 2026.
ACD Virtual Oceania on April 11th, 2026. CFP is currently open until January 31st, 2026.
ACD Romania on April 23rd-24th, 2026. CFP is currently open until February 15th, 2026.
ACD Türkiye on May 9th, 2026. CFP is currently open until February 28th, 2026.
New Relic Advance virtual event on February 24th (AMER) | 25th (EMEA & APAC).
AWS Community Summit Birmingham on June 4th, 2026. CFP is currently open until March 16th, 2026
📢 What's new in Serverless
AWS Lambda announces cross-account access for DynamoDB Streams.
AWS Databases are now available on v0 by Vercel.
Announcing increased 1 MB payload size support in Amazon EventBridge.
Amazon Cognito introduces inbound federation Lambda triggers.
Amazon Redshift Serverless adds queue-based query resource management.
Opening the AWS European Sovereign Cloud.
.NET 10 runtime now available in AWS Lambda.
👨💻 Word from the author
Thanks for the support and let’s share more about Serverless!!!
We know that some of the AWS teams were impacted with the downsizing, we have worked with some of them; if your company is hiring, please reach out to the impacted folks.
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Until next time, happy building on Serverless!