bharatviswa504 commented on pull request #1083:
URL: https://github.com/apache/hadoop-ozone/pull/1083#issuecomment-648409228


   My point here is just deleting a column family and assuming everything works 
with any incompatible change is wrong. 
   
   >This is what we have now. If this were the only concern, we can solve it by 
removing this ldb subcommand when upgrade >is implemented. Today we have 
incompatibilities where I can accept that we need tool to help admins.
   
   Yes, for now with an incompatible change this tool may help. But using this 
tool to solve such issues will not solve the problem completely, let's take an 
example of S3 incompatible change, we need other changes like  HDDS-3563. So, I 
am not sure just by exposing such tool, and when we see a column family is 
dropped and thinking that dropping a column family will resolve my upgrade 
issue. So, I am not sure just using this tool will help how much here.
   
   I have explained the same in one of my above comment in detail regarding 
this issue.
   https://github.com/apache/hadoop-ozone/pull/1083#issuecomment-646220673
   
   


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