wangxiaobaidu11 commented on pull request #12159:
URL: https://github.com/apache/druid/pull/12159#issuecomment-1038724386


   @JulianJaffePinterest  hi, I import a month's data to druid by spark 
connector. The data is partitioned by day. The number of lines per segment is 
in the tens of millions.
   
![image](https://user-images.githubusercontent.com/24448732/153815219-5a2d6a71-3abc-4d33-9ce2-16b56bb5705f.png)
   In my tests, I found that the import job took about an hour. How can I speed 
up the import?  Whether the segment can be split into numShard format for 
import?
   


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