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Summary of the Amazon DynamoDB Service Disruption in Northern Virginia (US-EAST-1) Region

Postmortem writeup of this week's massive AWS us-east-1 outage. tl;dr:

1. DynamoDB runs into a consistency failure in an internal DNS optimization service;
2. EC2 provisioning depends on DynamoDB and craps out;
3. Network load balancers screw up due to impact of EC2 outage.

Tags: dynamodb dns aws ec2 nlb outages post-mortems cloud-computing amazon us-east-1