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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2022/09/22 20:20:59 UTC

[GitHub] [druid] clintropolis commented on pull request #12277: add support for 'front coded' string dictionaries for smaller string columns

clintropolis commented on PR #12277:
URL: https://github.com/apache/druid/pull/12277#issuecomment-1255508084

   2.5m rows of data generated with https://github.com/lemire/StarSchemaBenchmark:
   
   <img width="1063" alt="Screen Shot 2022-09-22 at 1 17 50 PM" src="https://user-images.githubusercontent.com/1577461/191843031-67b56a65-8c35-4bbe-b3bc-2ca4b5c490eb.png">
   
   also (possibly coincidence) the smaller encoding seems to have a small positive effect on ingest task time:
   <img width="1445" alt="Screen Shot 2022-09-22 at 1 18 03 PM" src="https://user-images.githubusercontent.com/1577461/191843250-e7ff2731-48c3-464b-8d65-3394583d8e02.png">
   


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