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1. Impact on file meta: Currently, the stats (min, max, null count) in file meta are already unreliable, so no special handling will be performed for this aspect.
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Compatibility, Deprecation, and Migration Plan

Conversion between delete file mode (just temporarily call it) and original LSM

1. LSM -> delete file mode: can be directly switched (add a parameter to control whether to enable delete file).
2. delete file mode -> LSM, in theory, perform a full compaction, then clean up the old snapshot, and then disabled delete file mode.

[1]: https://github.com/apache/iceberg

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