FrankChen021 commented on pull request #10418:
URL: https://github.com/apache/druid/pull/10418#issuecomment-698060829


   Hi @vogievetsky  What you suggestion depends on how we define `tier`. The 
initial `tier` comes from historical nodes that serve different data retention 
rules. 
   
   From the user's view on all druid nodes, I think `tier` could also used to 
describe different `roles` of nodes with same node type, which means for 
coordinators, the division of leader and non-leader also fit into this 
definition. And for the back-end implementation, this PR chooses to put the 
information in `tier` field for simplicity.
   
   BTW,  I'll check and fix the integration tests failure later.


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