Hexiaoqiao commented on PR #6736:
URL: https://github.com/apache/hadoop/pull/6736#issuecomment-2082660933

   @XbaoWu @hiwangzhihui Thanks for your works. I prefer to push this feature 
into tool module.
   a. I totally agree that fsimage is not compatible with all versions (include 
some segment format, parellel loading etc) especially with some old verions, 
but some end users could need it. 
   b. However after traverse all active branches, it shows all of them are 
keeping the same format now. 
   c. Even this feature is ready online now, if you meet the compatible issues 
about fsimage, you need to restart NameNode to generate another new one, so I 
think fsimage tools could be more convenient.
   What do you think about?


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