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This is very similar to the COW table. One significant point to highlight is that For MOR table, inserts can go into into either parquet files or into log files. Clustering would only create parquet files.  Compaction This approach will continue to support both modes. The output of clustering is always parquet format.  Also, compaction and clustering cannot run at the same time on the same file groups. Compaction also needs changes to ignore file groups that are already clustered.

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