Database Reference
In-Depth Information
Figure 8-1
.
APS virtual machines
The PDW Control node VM provides the following critical functionality:
• Client connectivity and authentication
• System and database metadata
• SQL request processing
• Execution plan preparation
• Distributed execution orchestration
• Result aggregation
You can think of the Control node as the “brains” behind the distribution and paral-
lelization of PDW. Although metadata resides on the Control node, no user data is per-
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