nic-chen opened a new issue #2396:
URL: https://github.com/apache/apisix-dashboard/issues/2396


   # Background
   At present, the connection between the Manager API and etcd still follows 
the habit of the etcd v2 version, creating a watch connection for each 
resource, which will generate a large number of connections.
   
   # Purpose
   Reduce the number of connections between Manager API and etcd, to reduce the 
load on etcd services.
   
   # Proposal
   In the `Generic Store`, each resource still manages its own cache 
separately, but no longer connects directly to etcd. Added a unified method of 
fully reading data and watching changes, and the obtained data is uniformly 
distributed to the Store instances of each resource.
   After optimization, the workflow of `Generic Store` initialization is as 
follows:
   1. Create a resource prefix mapping table
   2. Initialize each resource Store object and register itself in the resource 
prefix mapping table
   3. Read the full amount of data, find the corresponding resource according 
to the key prefix, and distribute the data to the Store object of each resource
   4. Watch the etcd prefix configured in `conf.yaml`, when obtaining the 
changed data, find the corresponding resource according to the key prefix, and 
distribute the data to the Store object of the resource.
   
   The current connections between Manager API and etcd:
   
   
![image](https://user-images.githubusercontent.com/33000667/160437970-1398e1d7-596e-4f65-b50b-eda47fb3dac0.png)
   
   After optimization, the connections between Manager API and etcd:
   
   
![image](https://user-images.githubusercontent.com/33000667/160436000-6f54b646-838e-4d41-b249-2b4221fd874a.png)
   
   


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