You can use Tunnel Service in the Tablestore console.

Prerequisites

Tablestore is activated. For more information, see Activate Tablestore.

Create a tunnel

  1. Log on to the Tablestore console.
  2. On the Overview page, click the name of the target instance or click Manage Instance in the Actions column.
  3. In the Tables section of the Instance Details tab, click the name of the target table and click the Tunnels tab. You can also click fig_001 in the Actions column and select Tunnels.
  4. On the Tunnels tab, click Create Tunnel.
  5. In the Create Tunnel dialog box that appears, set Tunnel Name and Type.

    Tunnel Service provides three types of real-time consumption tunnels for distributed data, including Incremental, Full, and Differential. Incremental is selected in this topic as an example.

    After the tunnel is created, you can click Show Channels in the Actions column to check the data in the tunnel, monitor consumption latency, and check the number of consumed rows in each channel. fig_tunnel_service

Preview data types in a tunnel

After you create a tunnel, you can simulate data consumption to preview the data types in the tunnel.

  1. For more information about how to write data to or delete data from tables in the console, see Read and write data in the console.
  2. Preview the data types in a tunnel
    1. On the Overview page, click the name of the target instance or click Manage Instance in the Actions column.
    2. In the Tables section of the Instance Details tab, click the name of the target table and click the Tunnels tab. You can also click fig_001 in the Actions column and select Tunnels.
    3. On the Tunnels tab, click Show Channels in the Actions column.
    4. Click View Simulated Export Records in the Actions column.
    5. In the View Simulated Export Records dialog box that appears, click Start.
      The information about consumed data is displayed, as shown in the following figure. fig_consume_001

Enable data consumption for a tunnel

  1. Copy a tunnel ID from the tunnel list.
  2. Use Tunnel Service SDK in any programming language to enable data consumption for the tunnel.
    // Customize the data consumption callback or call the IChannelProcessor operation. Specify the process and shutdown methods.
    private static class SimpleProcessor implements IChannelProcessor {
        @Override
        public void process(ProcessRecordsInput input) {
            System.out.println("Default record processor, would print records count");
            System.out.println(
                String.format("Process %d records, NextToken: %s", input.getRecords().size(), input.getNextToken()));
            try {
                // Simulate the processing of data consumption.
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        @Override
        public void shutdown() {
            System.out.println("Mock shutdown");
        }
    }
    
    // We recommend that you share the same TunnelWorkerConfig. TunnelWorkerConfig provides more advanced parameters.
    TunnelWorkerConfig config = new TunnelWorkerConfig(new SimpleProcessor());
    // Configure TunnelWorker and start automatic data processing.
    TunnelWorker worker = new TunnelWorker($tunnelId, tunnelClient, config);
    try {
        worker.connectAndWorking();
    } catch (Exception e) {
        e.printStackTrace();
        worker.shutdown();
        tunnelClient.shutdown();
    }

View data consumption logs

After data is consumed, you can view the consumption logs of incremental data, including consumption statistics and the latest synchronization time of incremental data in channels. You can also log on to the Tablestore console or call the DescribeTunnel operation to view the consumption latency and the number of consumed rows in each channel.