Type that determines how data will be laid out as file and stored, inside a def~table.
Following table summarizes the trade-offs between these two dataset table types
|Trade-off||def~copy-on-write (COW)||def~merge-on-read (MOR)|
|Update cost (I/O)||Higher (rewrite entire def~table parquet)||Lower (append to `delta log`)|
|Write Amplification||Higher||Lower (depending on compaction strategy to the def~table parquet)|
|Query/Read Amplification||Lower/Zero||Higher (merging base and deltas on the fly)|