For instance, Strong and Bounded staleness consistency has no effect on the emulator, other than signaling to the Cosmos DB SDK the default consistency of the account. While consistency levels can be adjusted using command-line arguments for testing scenarios only (default setting is Session), a user might not expect the same behavior as in the cloud service. For more information on how to change this value, see Set the PartitionCount value article. When using the Azure Cosmos DB Emulator, by default, you can create up to 10 fixed size containers at 400 RU/s (only supported using Azure Cosmos DB SDKs), or 5 unlimited containers. The Linux emulator is not a scalable service and it doesn't support a large number of containers. With the Linux emulator, you can create an Azure Cosmos account in provisioned throughput mode only currently it doesn't support serverless mode. Since the Azure Cosmos DB Emulator provides an emulated environment that runs on the local developer workstation, there are some differences in functionality between the emulator and an Azure Cosmos account in the cloud:Ĭurrently, the Data Explorer pane in the emulator fully supports SQL API clients only. Differences between the Linux Emulator and the cloud service You can develop and test applications using the Azure Cosmos DB Linux Emulator, and deploy them to Azure at global scale by updating the Azure Cosmos DB connection endpoint.įunctionality that relies on the Azure infrastructure like global replication, single-digit millisecond latency for reads/writes, and tunable consistency levels are not applicable when you use the emulator. It supports equivalent functionality as the Azure Cosmos DB, which includes creating data, querying data, provisioning and scaling containers, and executing stored procedures and triggers. The Azure Cosmos DB Linux Emulator provides a high-fidelity emulation of the Azure Cosmos DB service. For heavier workloads, use our Windows emulator. We do not recommend use of the emulator (Preview) in production. The default number of physical partitions which directly impacts the number of containers that can be provisioned is 10. Users may experience slight performance degradations in terms of the number of requests per second processed by the emulator when compared to the Windows version.

The Cosmos DB Linux Emulator is currently in preview mode and supports only the SQL API.

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