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woso avatar woso commented on July 22, 2024
  1. 你理解的完全正确，group id就是为了表示有一部分特征是一样的，只保留一份，具体见’结构化压缩‘
  2. 实际上不会根据group id 来shuffle数据，数据需要提前排序好，group id一样的排在一起；offline我们对比把每天的用户样本打到一块，效果差别很小；online问题更小，实时过来的样本能被打到一块的很少；当然效果和具体数据相关，以上是阿里数据上的观察

另外大规模使用建议使用pb结构，效率比较高

from x-deeplearning.

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