Status: OUT
A crash during compaction produces irrecoverable data loss: no implementation uses write-temp/fsync/rename for atomicity (Bitcask deletes before renaming, LSM lacks atomic rename), and the resulting file corruption is terminal because every reader halts at the first CRC failure with no resync or skip capability.
non-atomic compaction + terminal corruption handling = crash during compaction is unrecoverable
Depends on (SL): compaction-lacks-crash-safety-across-implementations, corruption-is-terminal-across-all-readers