# TrainingBucketConfiguration

S3 bucket configuration for the training data.

Extends: TrainingBucketConfiguration
Extends: DataBucketConfiguration

- Source: [`aws-stepfunctions-tasks/lib/bedrock/create-model-customization-job.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0/packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/bedrock/create-model-customization-job.ts#L81)
- Type last changed: v2.199.0 · 27 May 2025

## Example

```ts
import * as bedrock from 'aws-cdk-lib/aws-bedrock';
import * as kms from 'aws-cdk-lib/aws-kms';

declare const outputBucket: s3.IBucket;
declare const trainingBucket: s3.IBucket;
declare const validationBucket: s3.IBucket;
declare const kmsKey: kms.IKey;
declare const vpc: ec2.IVpc;

const model = bedrock.FoundationModel.fromFoundationModelId(
  this,
  'Model',
  bedrock.FoundationModelIdentifier.AMAZON_TITAN_TEXT_G1_EXPRESS_V1,
);

const task = new tasks.BedrockCreateModelCustomizationJob(this, 'CreateModelCustomizationJob', {
  baseModel: model,
  clientRequestToken: 'MyToken',
  customizationType: tasks.CustomizationType.FINE_TUNING,
  customModelKmsKey: kmsKey,
  customModelName: 'MyCustomModel', // required
  customModelTags: [{ key: 'key1', value: 'value1' }],
  hyperParameters: {
    batchSize: '10',
  },
  jobName: 'MyCustomizationJob', // required
  jobTags: [{ key: 'key2', value: 'value2' }],
  outputData: {
    bucket: outputBucket, // required
    path: 'output-data/',
  },
  trainingData: {
    bucket: trainingBucket,
    path: 'training-data/data.json',
  }, // required
  // If you don't provide validation data, you have to specify `Evaluation percentage` hyperparameter.
  validationData: [
    {
      bucket: validationBucket,
      path: 'validation-data/data.json',
    },
  ],
  vpcConfig: {
    securityGroups: [new ec2.SecurityGroup(this, 'SecurityGroup', { vpc })],
    subnets: vpc.privateSubnets,
  },
});
```

## Properties

- `bucket`: [IBucket](/cdk/api/v2/docs/aws-cdk-lib.aws_s3.IBucket.html) (required) — The S3 bucket.

- `path`: string — Path to file or directory within the bucket.

  **Default:** root of the bucket