on.html">pipelined region</a>. The pipelined region is the basic unit of scheduling and failover by default. During scheduling, all vertices in a pipelined region will be scheduled together, and all pipelined regions in the graph will be scheduled one by one topologically.</p>
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<img src="/img/blog/2022-01-05-scheduler-performance/4-pipelined-region.svg" width="90%"/>
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Fig. 4 - The LogicalPipelinedRegion and the SchedulingPipelinedRegion
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<p>Currently, there are two types of