yurim022 opened a new issue #10821:
URL: https://github.com/apache/druid/issues/10821


   While trying to figure out the structure to use druid, several questions 
arose.
   The questions are below.
   
   1. When stored in deep storage periodically in real-time node, what is the 
standard for storing in deep storage? (For example, once a minute in deep 
storage, etc.)
   
   2. When saving the result obtained from the history node in the broker node, 
is it saved in segment units? When saving, I am wondering whether the entire 
segment is saved or only the result value of the query is saved correctly.
   
   2-1) If what I understand correctly, there is a cache in the historical node.
   
   When a query requests cache data,
   If the query is different but the result is the same, how do you handle it?
   
   3. Can the result value of a real-time node be stored directly in a 
historical node without going through deep storage?
   
   4. When indexing in a real-time node, is the bitmap encoding random or is 
there a criterion (if so, what is the criterion)
   
   
![image](https://user-images.githubusercontent.com/45115557/106381236-b257bb80-63fa-11eb-9e04-8620e9ac64b9.png)
   
   5. What is the reference point at which the real-time node index is flushed 
in in-memory or off-heap memory?
   
   thank you


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