Introduction to Azure Cosmos DB Table API

Azure Cosmos DB provides the Table API for applications that are written for Azure Table storage and that need premium capabilities like:

Applications written for Azure Table storage can migrate to Azure Cosmos DB by using the Table API with no code changes and take advantage of premium capabilities. The Table API has one client SDK available for .NET.

We recommend that you watch the following video, where Aravind Ramachandran explains how to get started with the Azure Cosmos DB Table API:

Table offerings

If you currently use Azure Table Storage, you gain the following benefits by moving to the Azure Cosmos DB Table API:

Azure Table storage Azure Cosmos DB Table API
Latency Fast, but no upper bounds on latency. Single-digit millisecond latency for reads and writes, backed with <10-ms latency reads and <15-ms latency writes at the 99th percentile, at any scale, anywhere in the world.
Throughput Variable throughput model. Tables have a scalability limit of 20,000 operations/s. Highly scalable with dedicated reserved throughput per table that's backed by SLAs. Accounts have no upper limit on throughput and support >10 million operations/s per table.
Global distribution Single region with one optional readable secondary read region for high availability. You can't initiate failover. Turnkey global distribution from one to 30+ regions. Support for automatic and manual failovers at any time, anywhere in the world.
Indexing Only primary index on PartitionKey and RowKey. No secondary indexes. Automatic and complete indexing on all properties, no index management.
Query Query execution uses index for primary key, and scans otherwise. Queries can take advantage of automatic indexing on properties for fast query times. The Azure Cosmos DB database engine is capable of supporting aggregates, geospatial, and sorting.
Consistency Strong within primary region. Eventual within secondary region. Five well-defined consistency levels to trade off availability, latency, throughput, and consistency based on your application needs.
Pricing Storage-optimized. Throughput-optimized.
SLAs 99.99% availability. 99.99% availability SLA for all single region accounts and all multi-region accounts with relaxed consistency, and 99.999% read availability on all multi-region database accounts Industry-leading comprehensive SLAs on general availability.

Get started

Create an Azure Cosmos DB account in the Azure portal. Then get started with our Quick Start for Table API by using .NET.

Important

If you created a Table API account during the preview, please create a new Table API account to work with the generally available Table API SDKs.

Next steps

Here are a few pointers to get you started: