Azure Cosmos DB Review
Updated July 28, 2021

Azure Cosmos DB Review

Anonymous | TrustRadius Reviewer
Score 8 out of 10
Vetted Review
Verified User

Overall Satisfaction with Azure Cosmos DB

The Azure Cosmos DB is being used as part of our platform. It is being used to help the existing platform we have to scale with the amount of data that we are storing. The data stored in SQL servers did not scale for us. Reports and graphs generated from the data were slow. Azure Cosmos DB improved performance.
  • Global key distribution
  • Elasticity in scale
  • ANSI SQL support
  • Pure ACIDity support
  • Learning curve is pretty high
  • Another "language" to learn
Azure Cosmos DB has the benefit of having multi-master key tenancy compared to Redis and Mongo. Reads are just as fast, if not faster than Mongo. However, the distribution of writes (i.e. ACID transactions) isn't as high as Google Cloud Spanner or CouchDB. Azure Cosmos DB writes slower than Cassandra, but with Cosmos, we do not have to worry about replication or tools like Zookeeper to handle it. Azure Cosmos DB has it built-in.
If issues are occurring with Mongo DB, then using Azure Cosmos DB could be better in certain instances. However, I would not replace it completely over Cassandra or Redis. Through size in k-v distribution could become an issue, especially with Redis. Azure Cosmos DB could help in that apsect.

Azure Cosmos DB Feature Ratings

Data model flexibility
Deployment model flexibility

Upgrading Azure Cosmos DB

The total cost of ownership is much higher than anticipated. The documentation for their API calls is still not complete. TCO did go up as a result as well. Having users learning another JQL-like language also added more complexity to it. Support of ANSI-SQL would be ideal. But the cost of managing it is much less compared to Redis, Mongo, or Cassandra.