This topic describes the FAQ about Stream Studio.

What computing engine do I need to activate before I can use Stream Studio?

Before you can use Stream Studio, you must activate Realtime Compute because Stream Studio is a development platform based on Alibaba Cloud Realtime Compute.

Which modes of Realtime Compute does Stream Studio support?

Stream Studio supports Realtime Compute in the shared mode and exclusive mode.

Are there differences between Realtime Compute in the shared mode and that in the exclusive mode for Stream Studio?

Yes, there are differences. For security purposes, Realtime Compute in the shared mode does not support UDFs, whereas that in the exclusive mode supports. If you have high requirements on the performance and features, we recommend that you use Realtime Compute in the exclusive mode.

Where can I create a Realtime Compute project and bind it to a DataWorks workspace?

You can create a Realtime Compute project in the Realtime Compute console after logon.

To bind the created Realtime Compute project to a DataWorks workspace, follow these steps: Log on to the DataWorks console and click Workspaces in the left-side navigation pane. On the Workspaces page that appears, find the target workspace and bind the Realtime Compute project to the workspace. You can also bind the Realtime Compute project to a new workspace when you create the workspace. After you bind the Realtime Compute project to a workspace, you can go to Stream Studio.

What are the advantages of the directed acyclic graph (DAG) mode in Stream Studio? What are the similarities and differences between the DAG mode and SQL mode?

Stream Studio supports both the DAG mode and the SQL mode to develop real-time computing nodes. In the DAG mode, you can perform drag-and-drop operations on components to configure real-time computing nodes without writing code. You can freely switch between the DAG mode and the SQL mode.

What types of SQL does Stream Studio support?

Realtime Compute is based on Apache Flink. Therefore, Stream Studio supports Flink SQL.

What can I do if I cannot create a node on the Stream Studio page?

Before you can properly use Stream Studio, you must activate Realtime Compute, create a project, and then bind the project to a DataWorks workspace.

If you still cannot create a node on the Stream Studio page after completing the preceding steps, follow these steps:
  • Clear the browser cache.
  • Verify that the AccessKey ID and AccessKey secret are bound to Stream Studio.
  • Verify that the workspace to which the Realtime Compute project is bound has the permission to access Realtime Compute.