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AWS::SageMaker::EndpointConfig PrefixAwareRoutingConfig - AWS CloudFormation
SyntaxProperties

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AWS::SageMaker::EndpointConfig PrefixAwareRoutingConfig

The configuration for prefix-aware routing on a SageMaker real-time inference endpoint. Specify PrefixLength and ConcurrencyThreshold to control routing behavior.

Syntax

To declare this entity in your CloudFormation template, use the following syntax:

JSON

{
  "ConcurrencyThreshold" : Integer,
  "PrefixLength" : Integer
}

YAML

  ConcurrencyThreshold: Integer
  PrefixLength: Integer

Properties

ConcurrencyThreshold

The maximum number of in-flight requests on the target instance before the endpoint routes to another instance. Required when RoutingStrategy is PREFIX_AWARE. When in-flight requests on the prefix-selected instance reach this threshold, the endpoint routes the request to an instance with more available capacity.

Required: No

Type: Integer

Minimum: 1

Maximum: 1024

Update requires: Replacement

PrefixLength

The maximum length of the prefix used for routing decisions. Required when RoutingStrategy is PREFIX_AWARE.

  • For the SageMaker Runtime InvokeEndpoint and InvokeEndpointWithResponseStream APIs, this value specifies the number of bytes from the beginning of the request body.

  • For OpenAI-compatible API, this value specifies the number of characters from the text content of the messages array.

The endpoint routes requests that share the same prefix to the same instance. Set this value to cover shared content (such as system prompts) plus enough unique content to distribute workloads across instances.

Required: No

Type: Integer

Minimum: 1024

Maximum: 65536

Update requires: Replacement