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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2022/10/23 02:10:18 UTC

[GitHub] [doris] morningman commented on a diff in pull request #13577: [doc](random_sink) Add some doc content about random sink

morningman commented on code in PR #13577:
URL: https://github.com/apache/doris/pull/13577#discussion_r1002617472


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docs/zh-CN/docs/data-table/data-partition.md:
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@@ -338,12 +338,18 @@ Doris 支持两层的数据划分。第一层是 Partition，支持 Range 和 Li
 
    > 注：表的数据量可以通过 [`SHOW DATA`](../sql-manual/sql-reference/Show-Statements/SHOW-DATA.md) 命令查看，结果除以副本数，即表的数据量。
 
+4. **关于 Random Distribution 的设置以及使用场景。**   
+    - 如果 OLAP 表没有更新类型的字段，将表的数据分桶模式设置为 RANDOM，则可以避免严重的数据倾斜。

Review Comment:
   这里加一下 random distribution 的原理说明吧。比如设置random 后，数据是“如何”被指定到“哪一个”tablet的。



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