Preparing Data

To create a Flink job, you need to enter the data source and data output channel, that is, source and sink. To use another service as the source or sink stream, you need to apply for the service first.

Flink jobs support the following data sources and output channels:

• DIS as the data input and output channel

  To use DIS as the data source and output channel, you need to enable DIS first.

  For details about how to create a DIS stream, see Creating a DIS Stream in the Data Ingestion Service User Guide.

  After applying for a DIS stream, you can upload local data to DIS to provide data sources for Flink jobs in real time. For details, see Sending Data to DIS in the Data Ingestion Service User Guide.

  An example is provided as follows:

  1,lilei,bmw320i,28
  2,hanmeimei,audia4,27

• OBS as the data source

  To use OBS as the data source, enable OBS first. For details about how to enable OBS, see Enabling OBS in the Object Storage Service Console Operation Guide.

  After you enable OBS, upload local files to OBS using the Internet. For detailed operations, see Uploading a File in the Object Storage Service Console Operation Guide.

• RDS as the output channel

  To use RDS as the output channel, create an RDS instance. For details, see Creating a DB Instance in the Relational Database Service User Guide.

• SMN as the output channel

  To use SMN as the output channel, create an SMN topic to obtain the URN resource ID and then add topic subscription. For detailed operations, see Getting Started in the Simple Message Notification User Guide.

• Kafka as the data input and output channel

  If Kafka serves as both the source and sink streams, create an enhanced datasource connection between Flink jobs and Kafka. For details, see Enhanced Datasource Connections.

  If the port of the Kafka server is listened on by the host name, you need to add the mapping between the host name and IP address of the Kafka Broker node to the datasource connection.

• CloudTable as the data input and output channel

  To use CloudTable as the data input and output channel, create a cluster in CloudTable and obtain the cluster ID.

• CSS as the output channel

  To use CSS as the data output channel, create a cluster in CSS and obtain the cluster's private network address. For details, see Getting Started in the Cloud Search Service User Guide.

• DCS as the output channel

  To use DCS as the output channel, create a Redis cache instance in DCS and obtain the address used for Flink jobs to connect to the Redis instance. For detailed operations, see Getting Started in the Distributed Cache Service User Guide.