如果AWS Lambda函数具有来自多个Kinesis流的事件源，那么传入记录的批处理将来自单个Kinesis流还是混合源?

问题描述：

标题可能有点混乱.我会尽力使它更清楚.

The title might be a bit confusing. I'll try my best to make it clearer.

假设我有一个AWS Lambda函数，它具有两个不同的Kinesis流A和B作为输入事件源.

Suppose I have a AWS Lambda function that has two different Kinesis streams A and B as input event sources.

那么，对于以下情况，由于KinesisEvent实例包含一批记录，该批处理将包含来自单个流的记录，还是本质上它包含来自流A和B的记录?

So, for the below, since a KinesisEvent instance contains a batch of records, will the batch contain records from a single stream, or essentially it contain records from both streams A and B?

public class ProcessKinesisEvents {
    public void recordHandler(KinesisEvent event, Context context) {
        ...
    }
}

答

AWS Kinesis 之间的每个映射流和 AWS Lambda 函数是通过调用 EventSourceArn 和批量大小:

Each mapping between an AWS Kinesis stream and an AWS Lambda function is a dedicated entity resulting from a call to CreateEventSourceMapping and comprised of the EventSourceArn and the FunctionName, for which you also specify a dedicated Batch Size accordingly:

POST /2015-03-31/event-source-mappings/ HTTP/1.1
Content-type: application/json

{
    "BatchSize": number,
    "Enabled": boolean,
    "EventSourceArn": "string",
    "FunctionName": "string",
    "StartingPosition": "string"
}

因此，您将收到的批次将限制为构成响应的单个事件源.映射，以及每个其他事件源都将相应地对Lambda函数进行单独调用，因此所有内容均已正确隔离.

Consequently, the batches you will receive are constrained to the single event source that constitutes the resp. mapping, and each other event source will yield a separate invocation of your Lambda function accordingly, so everything is properly isolated.

如果AWS Lambda函数具有来自多个Kinesis流的事件源，那么传入记录的批处理将来自单个Kinesis流还是混合源?

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