siddharthteotia commented on pull request #5619:
URL: https://github.com/apache/incubator-pinot/pull/5619#issuecomment-649302759


   > Amazing work!
   > 
   > We definitely need a backward compatibility test for segments.
   
   @kishoreg , there is no backward incompatibility here. The PR  
https://github.com/apache/incubator-pinot/pull/5510 actually results in double 
memory allocation (as explained above in the description)
   
   W.r.t tests for backward compatibility of raw index reader writer, we 
already have them. There are files checked in from prior versions to ensure 
current readers can read old versions. We have them for both compressed and 
uncompressed. I recently added more tests too. See 
VarByteChunkSingleValueWriterTest.java


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