What is Directed Acyclic Graph (DAG)?

A Directed Acyclic Graph (DAG) is a graphical data structure used to represent a series of tasks or activities. Each node in the graph represents a task, and the directed edges between nodes indicate the order in which the tasks must be executed. A DAG ensures that tasks are executed in a specific order without creating any cycles or loops.

DAGs provide a visual representation of complex data processing workflows. In the context of batch processing, a DAG can be used to model the steps involved in generating sales reports. For instance, a DAG can depict the loading of raw sales data, currency conversion, data summarization, and report generation. This visual representation helps in understanding and optimizing the overall workflow.