SzyWilliam commented on PR #15014:
URL: https://github.com/apache/iotdb/pull/15014#issuecomment-2723696236

   1. When a new DataNode registers, ConfigNode will trigger topology probing 
immediately
   <img width="796" alt="image" 
src="https://github.com/user-attachments/assets/6b116579-38bb-4f19-8616-13fce7d1f4ac";
 />
   2. DataNode will learn the latest topology from ConfigNode via heartbeats
   <img width="554" alt="image" 
src="https://github.com/user-attachments/assets/3e7eec6b-392b-4425-b233-a9458eb80f69";
 />
   3. Manually kill a DataNode, topology change will be detected:
   
   <img width="792" alt="image" 
src="https://github.com/user-attachments/assets/999decbf-1200-496c-8b2a-3496cb590368";
 />
   
   <img width="556" alt="image" 
src="https://github.com/user-attachments/assets/f1947059-49af-4f88-88db-22c8467d598f";
 />
   
   4. Restart this DataNode again, the topology will soon be updated.
   <img width="1132" alt="image" 
src="https://github.com/user-attachments/assets/a7e566ec-55e8-468a-8880-5fea73b1e6fd";
 />
   


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