[GitHub] [rocketmq] lizhanhui commented on issue #5536: [Static Topic] Is it necessary to consider the compatible while upgrade namesrv and broker?

[GitBox <gi...@apache.org>]

lizhanhui commented on issue #5536:
URL: https://github.com/apache/rocketmq/issues/5536#issuecomment-1318030271

   We should define an upgrade blueprint, allowing clusters of previous versions to update without disruption.
   
   A viable way is to upgrade name servers first, which provides capabilities of serving both broker versions;
   After all name server nodes are updated, then start to upgrade brokers.
   
   Name servers, thus, have to be able to process the transitional states: 1) all brokers miss placement configs; 2) partial brokers miss placement configs; 3) all brokers have placement configs.


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