jihoonson commented on issue #9791: URL: https://github.com/apache/druid/issues/9791#issuecomment-656473700
> Apart from the UnionDataSource redesign, one other useful MultiDataSource implementation would be something like a Priority list datasource that accepts an ordered list of tables. For example if the tables are `table1` and `table2`, the priority list datasource would attempt to serve every query out of `table1` and would use `table2` only for intervals with missing segments on `table1`. Could you explain more details? It would help others understand the design choice of `MultiDataSource`. It seems like this datasource will involve multiple roundtrips in a single query. How do the broker and historicals interact each other? Also, how do you tell some segments are missing in `table1`? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
