Use PutRecords with an AWS SDK or CLI

To write multiple records into a data stream

The following put-records example writes a data record using the specified partition key and another data record using a different partition key in a single call.

aws kinesis put-records \
    --stream-name samplestream \
    --records Data=blob1,PartitionKey=partitionkey1 Data=blob2,PartitionKey=partitionkey2

Output:

{
    "FailedRecordCount": 0,
    "Records": [
        {
            "SequenceNumber": "49600883331171471519674795588238531498465399900093808706",
            "ShardId": "shardId-000000000004"
        },
        {
            "SequenceNumber": "49600902273357540915989931256902715169698037101720764562",
            "ShardId": "shardId-000000000009"
        }
    ],
    "EncryptionType": "KMS"
}

For more information, see Developing Producers Using the Amazon Kinesis Data Streams API with the AWS SDK for Java in the Amazon Kinesis Data Streams Developer Guide.

import { PutRecordsCommand, KinesisClient } from "@aws-sdk/client-kinesis";

/**
 * Put multiple records into a Kinesis stream.
 * @param {{ streamArn: string }} config
 */
export const main = async ({ streamArn }) => {
  const client = new KinesisClient({});
  try {
    await client.send(
      new PutRecordsCommand({
        StreamARN: streamArn,
        Records: [
          {
            Data: new Uint8Array(),
            /**
             * Determines which shard in the stream the data record is assigned to.
             * Partition keys are Unicode strings with a maximum length limit of 256
             * characters for each key. Amazon Kinesis Data Streams uses the partition
             * key as input to a hash function that maps the partition key and
             * associated data to a specific shard.
             */
            PartitionKey: "TEST_KEY",
          },
          {
            Data: new Uint8Array(),
            PartitionKey: "TEST_KEY",
          },
        ],
      }),
    );
  } catch (caught) {
    if (caught instanceof Error) {
      //
    } else {
      throw caught;
    }
  }
};

// Call function if run directly.
import { fileURLToPath } from "node:url";
import { parseArgs } from "node:util";

if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const options = {
    streamArn: {
      type: "string",
      description: "The ARN of the stream.",
    },
  };

  const { values } = parseArgs({ options });
  main(values);
}