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Azure Cosmos DB for Table and Azure Table Storage use the same table data model and operations, so you can build scalable applications easily. This article shows how to use both services together for efficient table storage management.
Note
The serverless capacity mode is available on Azure Cosmos DB API for Table. For more information, see Azure Cosmos DB serverless.
If you currently use Azure Table Storage, you gain the following benefits by moving to Azure Cosmos DB for Table:
| Feature | Azure Table Storage | Azure Cosmos DB for Table |
|---|---|---|
| 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 per second. | 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 per second per table in provisioned throughput mode. |
| Global distribution | Single region with one optional readable secondary read region for high availability that supports automatic and manual account failover. | Turnkey global distribution from one to 30+ regions. Support for service-managed 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. |
| 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 | Consumption-based. | Available in both consumption-based and provisioned capacity modes. |
| 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. |
Azure SDKs
The Azure software development kits (SDKs) provide libraries for multiple programming languages, enabling developers to interact with Azure Cosmos DB for Table and Azure Table Storage seamlessly.
Current release
These SDK packages work with both Azure Cosmos DB for Table and Table Storage.
Prior releases
These SDK packages work only with Azure Cosmos DB for Table.
.NET.
Azure.Data.Tablesis available on NuGet. The Azure Tables client library targets either Table Storage or Azure Cosmos DB for Table service endpoints with no code changes.Python.
azure-cosmosdb-tableis available from PyPi. This SDK connects with both Table Storage and Azure Cosmos DB for Table.JavaScript/TypeScript.
azure-storageis available on npm.js. This Azure Storage SDK connects to Azure Cosmos DB accounts using the API for Table.Java. Microsoft Azure Storage Client SDK for Java is available on Maven. This Azure Storage SDK connects to Azure Cosmos DB accounts using the API for Table.
C++. Azure Storage Client Library for C++ lets you build applications for Azure Storage.
Ruby. Azure Storage Table Client Library for Ruby provides a Ruby package to access Azure storage Table services.
PHP. Azure Storage Table PHP Client Library provides a PHP client library to access Azure storage Table services.
PowerShell.
AzureRmStorageTablePowerShell module has cmdlets to work with storage Tables.