AWS Firehose DynamicPartitioningConfiguration/Prefix无法正常工作可能是因为您未正确设置分区键或配置前缀。以下是设置动态分区的示例代码：

{
  "DataDeliveryStreamName": "example-stream",
  "ExtendedS3DestinationConfiguration": {
    "RoleARN": "arn:aws:iam::123456789012:role/example-role",
    "BucketARN": "arn:aws:s3:::example-bucket",
    "Prefix": "example-prefix/",
    "BufferingHints": {
      "SizeInMBs": 128,
      "IntervalInSeconds": 900
    },
    "CompressionFormat": "UNCOMPRESSED",
    "EncryptionConfiguration": {
      "NoEncryptionConfig": "NoEncryption"
    },
    "CloudWatchLoggingOptions": {
      "Enabled": true,
      "LogGroupName": "/aws/kinesisfirehose/example-stream",
      "LogStreamName": "{timestamp}"
    },
    "ProcessingConfiguration": {
      "Enabled": true,
      "Processors": [{
        "Type": "Lambda",
        "Parameters": [{
          "ParameterName": "LambdaArn",
          "ParameterValue": "arn:aws:lambda:us-west-2:123456789012:function:example-lambda"
        }]
      }]
    },
    "S3BackupMode": "FailedEventsOnly",
    "S3BackupConfiguration": {
      "RoleARN": "arn:aws:iam::123456789012:role/example-role",
      "BucketARN": "arn:aws:s3:::example-backup-bucket",
      "Prefix": "example-backup-prefix/"
    },
    "ProcessingHints": {
      "Enabled": true,
      "ProcessorHints": [{
        "ProcessorType": "Lambda",
        "BufferingHints": {
          "SizeInMBs": 256,
          "IntervalInSeconds": 120
        },
        "RetryOptions": {
          "DurationInSeconds": 300
        },
        "RoleARN": "arn:aws:iam::123456789012:role/lambda-role",
        "LambdaProcessorParameters": {
          "BatchSize": 123,
          "ParallelizationFactor": 2,
          "EventSizeThreshold":