AWS SDK Version 3 for .NET
API Reference

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Updates the shard count of the specified stream to the specified number of shards.

Updating the shard count is an asynchronous operation. Upon receiving the request, Kinesis Data Streams returns immediately and sets the status of the stream to UPDATING. After the update is complete, Kinesis Data Streams sets the status of the stream back to ACTIVE. Depending on the size of the stream, the scaling action could take a few minutes to complete. You can continue to read and write data to your stream while its status is UPDATING.

To update the shard count, Kinesis Data Streams performs splits or merges on individual shards. This can cause short-lived shards to be created, in addition to the final shards. We recommend that you double or halve the shard count, as this results in the fewest number of splits or merges.

This operation has the following default limits. By default, you cannot do the following:

For the default limits for an AWS account, see Streams Limits in the Amazon Kinesis Data Streams Developer Guide. To request an increase in the call rate limit, the shard limit for this API, or your overall shard limit, use the limits form.


For .NET Core, PCL and Unity this operation is only available in asynchronous form. Please refer to UpdateShardCountAsync.

Namespace: Amazon.Kinesis
Assembly: AWSSDK.Kinesis.dll
Version: 3.x.y.z


public abstract UpdateShardCountResponse UpdateShardCount(
         UpdateShardCountRequest request
Type: Amazon.Kinesis.Model.UpdateShardCountRequest

Container for the necessary parameters to execute the UpdateShardCount service method.

Return Value
The response from the UpdateShardCount service method, as returned by Kinesis.


InvalidArgumentException A specified parameter exceeds its restrictions, is not supported, or can't be used. For more information, see the returned message.
LimitExceededException The requested resource exceeds the maximum number allowed, or the number of concurrent stream requests exceeds the maximum number allowed.
ResourceInUseException The resource is not available for this operation. For successful operation, the resource must be in the ACTIVE state.
ResourceNotFoundException The requested resource could not be found. The stream might not be specified correctly.

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

Supported Versions: 4.6 and above
Supported Platforms: Android, iOS, Standalone

See Also