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On this page
  • Data Stream
  • Creating a Schema
  • Creating a table config
  • Uploading your schema and table config
  • Loading sample data into stream
  • Ingesting streaming data

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  1. Basics
  2. Getting started

Stream ingestion example

The Docker instructions on this page are still WIP

PreviousBatch import exampleNextData import

Last updated 4 years ago

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So far, we setup our cluster, ran some queries on the demo tables and explored the admin endpoints. We also uploaded some sample batch data for transcript table.

Now, it's time to ingest from a sample stream into Pinot.

Data Stream

First, we need to setup a stream. Pinot has out-of-the-box realtime ingestion support for Kafka. Other streams can be plugged in, more details in .

Let's setup a demo Kafka cluster locally, and create a sample topic transcript-topic

Start Kafka

docker run \
    --network pinot-demo --name=kafka \
    -e KAFKA_ZOOKEEPER_CONNECT=pinot-quickstart:2123/kafka \
    -e KAFKA_BROKER_ID=0 \
    -e KAFKA_ADVERTISED_HOST_NAME=kafka \
    -d wurstmeister/kafka:latest

Create a Kafka Topic

docker exec \
  -t kafka \
  /opt/kafka/bin/kafka-topics.sh \
  --zookeeper pinot-quickstart:2123/kafka \
  --partitions=1 --replication-factor=1 \
  --create --topic transcript-topic

Start Kafka

Start Kafka cluster on port 9876 using the same Zookeeper from the quick-start examples

bin/pinot-admin.sh  StartKafka -zkAddress=localhost:2123/kafka -port 9876

Create a Kafka topic

Download the latest . Create a topic

bin/kafka-topics.sh --create --bootstrap-server localhost:9876 --replication-factor 1 --partitions 1 --topic transcript-topic

Creating a Schema

Creating a table config

/tmp/pinot-quick-start/transcript-table-realtime.json
{
  "tableName": "transcript",
  "tableType": "REALTIME",
  "segmentsConfig": {
    "timeColumnName": "timestamp",
    "timeType": "MILLISECONDS",
    "schemaName": "transcript",
    "replicasPerPartition": "1"
  },
  "tenants": {},
  "tableIndexConfig": {
    "loadMode": "MMAP",
    "streamConfigs": {
      "streamType": "kafka",
      "stream.kafka.consumer.type": "lowlevel",
      "stream.kafka.topic.name": "transcript-topic",
      "stream.kafka.decoder.class.name": "org.apache.pinot.plugin.stream.kafka.KafkaJSONMessageDecoder",
      "stream.kafka.consumer.factory.class.name": "org.apache.pinot.plugin.stream.kafka20.KafkaConsumerFactory",
      "stream.kafka.broker.list": "localhost:9876",
      "realtime.segment.flush.threshold.time": "3600000",
      "realtime.segment.flush.threshold.size": "50000",
      "stream.kafka.consumer.prop.auto.offset.reset": "smallest"
    }
  },
  "metadata": {
    "customConfigs": {}
  }
}

Uploading your schema and table config

Now that we have our table and schema, let's upload them to the cluster. As soon as the realtime table is created, it will begin ingesting from the Kafka topic.

docker run \
    --network=pinot-demo \
    -v /tmp/pinot-quick-start:/tmp/pinot-quick-start \
    --name pinot-streaming-table-creation \
    apachepinot/pinot:latest AddTable \
    -schemaFile /tmp/pinot-quick-start/transcript-schema.json \
    -tableConfigFile /tmp/pinot-quick-start/transcript-table-realtime.json \
    -controllerHost pinot-quickstart \
    -controllerPort 9000 \
    -exec
bin/pinot-admin.sh AddTable \
    -schemaFile /tmp/pinot-quick-start/transcript-schema.json \
    -tableConfigFile /tmp/pinot-quick-start/transcript-table-realtime.json \
    -exec

Loading sample data into stream

Here's a JSON file for transcript table data:

/tmp/pinot-quick-start/rawData/transcript.json
{"studentID":205,"firstName":"Natalie","lastName":"Jones","gender":"Female","subject":"Maths","score":3.8,"timestamp":1571900400000}
{"studentID":205,"firstName":"Natalie","lastName":"Jones","gender":"Female","subject":"History","score":3.5,"timestamp":1571900400000}
{"studentID":207,"firstName":"Bob","lastName":"Lewis","gender":"Male","subject":"Maths","score":3.2,"timestamp":1571900400000}
{"studentID":207,"firstName":"Bob","lastName":"Lewis","gender":"Male","subject":"Chemistry","score":3.6,"timestamp":1572418800000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Geography","score":3.8,"timestamp":1572505200000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"English","score":3.5,"timestamp":1572505200000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Maths","score":3.2,"timestamp":1572678000000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Physics","score":3.6,"timestamp":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"Maths","score":3.8,"timestamp":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"English","score":3.5,"timestamp":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"History","score":3.2,"timestamp":1572854400000}
{"studentID":212,"firstName":"Nick","lastName":"Young","gender":"Male","subject":"History","score":3.6,"timestamp":1572854400000}

Push sample JSON into Kafka topic, using the Kafka script from the Kafka download

bin/kafka-console-producer.sh \
    --broker-list localhost:9876 \
    --topic transcript-topic < /tmp/pinot-quick-start/rawData/transcript.json

Ingesting streaming data

If you followed the , you have already pushed a schema for your sample table. If not, head over to on that page, to learn how to create a schema for your sample data.

If you followed , you learnt how to push an offline table and schema. Similar to the offline table config, we will create a realtime table config for the sample. Here's the realtime table config for the transcript table. For a more detailed overview about table, checkout .

As soon as data flows into the stream, the Pinot table will consume it and it will be ready for querying. Head over to the to checkout the realtime data

Pluggable Streams
Kafka
Batch upload sample data
Table
Query Console
Batch upload sample data
Creating a schema