qidaye opened a new pull request, #42280:
URL: https://github.com/apache/doris/pull/42280

   ## Proposed changes
   
   To check correctness of index file produced by index compaction process, we 
add a switch `dual_write_inverted_index_enable` (default is `false`). 
   When both `inverted_index_compaction_enable` and 
`dual_write_inverted_index_enable` are `true`, Doris will produce index file 
through both normal compaction process and index compaction process, and 
compares both index files, which are theoretically identical. Doris will log 
FATAL and crash after the check failed.
   
   We add this feature only for test, *DO NOT* use it in production.
   
   


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