liubao created SCB-2841:
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             Summary: zone-aware filter support configure group size ratio
                 Key: SCB-2841
                 URL: https://issues.apache.org/jira/browse/SCB-2841
             Project: Apache ServiceComb
          Issue Type: New Feature
          Components: Java-Chassis
            Reporter: liubao
            Assignee: liubao
             Fix For: java-chassis-3.0.0, java-chassis-2.9.0


Problem: When recovery from one AZ error, the initial instances of the 
recovering AZ may have very small instances. If the traffic is very big, using 
zone-aware will not have the ability to process the requests. 

 

Solution: add an `ratio` to control if using zone-aware. If the instances size 
is bigger than the configured threshold, then use or not use. 



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