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Migrating to DynamoDB, Part 2: A Zero Downtime Approach With GSIs

By Garrett Heel on .

This post is the second in a two-part series about migrating to DynamoDB by Runscope Engineer Garrett Heel (see Part 1).

We recently went over how we made a sizable migration to DynamoDB, encountering the “hot partition” problem that taught us the importance of understanding partitions when designing a schema. To recap, our customers use Runscope to run a wide variety of API tests, and we initially stored the results of all those tests in a PostgreSQL database that we managed on EC2. Needless to say, we needed to scale, and we chose to migrate to DynamoDB.

Here, we’ll show how we implemented the long-term solution to this problem by changing to...

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