THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- A client sends a request to the leader's ClientServer;
- ClientServer parses the request and lets Coordinator handle it;
- Coordinator routes the request with the help of metaMember;
- Finding out that the node should process the request, Coordinator MetaMember forwards the request to its DataClusterServer;
- DataClusterServer finds the associated DataMember that should process it;
- DataMember creates a log for the request and appends it to its RaftLogManager;
- DataMember sends the log to other nodes in its DataGroup;
- After sending to enough replicas, DataMember commit the log to its RaftLogManager;
- RaftLogManager then applies the log to the underlying IoTDB;
- The result is returned to the client.
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