Migration Guide
Migrate from DynamoDB to Cosmos DB
Migrate AWS DynamoDB to Azure Cosmos DB. Map partition keys, translate query patterns, choose Cosmos DB API (SQL, MongoDB, etc.).
What you get
Risk assessment
Blockers, warnings, and unknowns ranked by severity
Effort estimate
Hours, t-shirt size, and role breakdown
Cost estimate
Labor, infrastructure, and tooling cost range
Migration steps
Ordered execution plan with durations
Open questions
What still needs to be answered before you start
Draft config or code
Starter configs when the migration path supports it
Why teams migrate from DynamoDB to Cosmos DB
Good fit when
- +Teams migrating NoSQL workloads to Azure alongside other service migrations.
- +Organizations wanting multi-model database capabilities (SQL API, MongoDB API, etc.).
- +Teams that need turnkey global distribution with multi-region writes.
Strengths
- Multiple API options (SQL, MongoDB, Cassandra, Gremlin, Table) for flexible data modeling.
- Turnkey global distribution with configurable consistency levels.
- Deep integration with Azure services and Entra ID for auth.
Tradeoffs
- DynamoDB's pricing model (on-demand/provisioned RCU/WCU) differs from Cosmos DB's RU-based model.
- Partition key design translates but requires careful RU cost analysis.
- DynamoDB-specific features (DAX caching, PartiQL) have different Cosmos DB equivalents.
Migration notes
- Choose the appropriate Cosmos DB API based on query patterns and data model.
- Map DynamoDB partition keys to Cosmos DB partition keys; analyze RU consumption.
- Export data from DynamoDB and import using Cosmos DB data migration tool.
- Rewrite application queries to match the chosen Cosmos DB API.
How it works
Describe your migration
Select DynamoDB as source and Cosmos DB as target. Add context about your setup — configs, docs, architecture notes.
Keshro runs the analysis
Keshro researches the path, finds similar past migrations, and generates a structured assessment with risks, effort, cost, and steps.
Get your plan
Review the migration plan, refine it with your team, and use it as a living document during execution.
Resources
Related migrations
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