ptlrs commented on PR #9813:
URL: https://github.com/apache/ozone/pull/9813#issuecomment-4282801560

   >Since RocksDB 9, BlockBasedTableOptions.format_version=6 is the default. 
Files written in format_version 6 cannot be read by RocksDB < 8.6.0. This PR 
explicitly sets the default to version 5 to be compatible with 7.7.3 in the 
case where Ozone gets downgraded before it gets finalized after an upgrade. 
ref: https://github.com/facebook/rocksdb/releases/tag/v9.0.0
   
   Can we explore what it would take to support the newer file formats? 
   What are the challenges with the following and other potential solutions:
   - For a fresh installation, we could use the newer format by default.
   - For an upgrade scenario, we could consider re-ingesting the SST files. 


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