Managed Cassandra vs
Amazon DynamoDB

Scalability. Reliability. Predictable Performance.

Are you looking at deploying either Apache Cassandra or DynamoDB? 

Both databases have similar architecture and both offer incredible scalability, reliability, and resilience. However, there are also many differences. 

Understanding the differences and cost benefits can help you determine the right solution for your application.

Instaclustr Managed Apache Cassandra

Instaclustr’s Managed Cassandra pricing is easy to calculate, and as you scale out you can expect to see the average cost per node drop. Alternatively, DynamoDB’s cost structure includes a range of variables ranging from network, read and write throughput, and storage. 

We analyzed monitoring data from 1500+ Apache Cassandra nodes that we manage and demonstrated savings of 57%. 

Download our free white paper Managed Apache Cassandra vs DynamoDB to look at our use case in detail and see how you can save on infrastructure costs with Instaclustr’s Managed Cassandra.

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Anjali Srivastava

DynamoDB vs Cassandra
Data Model Differences

Cassandra is implemented as a wide column store. It runs on instances/machines and can be configured to take advantage of native and OS level page caching, meaning hot partitions will generally be served from memory and if needed the entire resources of a single machine (and replicas) can be dedicated to serving a single partition.

DynamoDB is a document and pure key-value store and is limited to 5000 writes/reads per second for a given 10GB shard, which means hot partitions are limited in both size and throughput, whereas with Cassandra they are generally limited purely on a size basis.

Understanding High-Level Differences

DescriptionManaged CassandraAmazon DynamoDB
LicenceApache Open SourceAWS Proprietary
Deployable CloudAny CloudOnly on AWS
Developer’s learning curveLower. Querying data with SQL like languageQuerying data with a proprietary API
Data ModelingJSON SupportMaterialized view
TTL (Time-To-Live)Support on columnsSupports at the item level
Multi-Region, Active-Active Data ReplicationNative, tunable with full reconciliation and repair capabilitySupported but no native reconciliation and repair
Capacity Sharding UnitInstance level (many partitions, up to 2TB)Partition level (up to 10GB)
BackupsContinuous (zero data loss), daily or on-demand backupsOn-demand backup