Status: OUT
Data integrity verification degrades monotonically along the storage pipeline: WAL records have CRC checksums that exclude routing metadata (partial coverage), SSTables have no checksums at all (zero coverage), and neither layer can recover from detected corruption — data transitions from partially verified to completely unverified as it moves through compaction from WAL to SSTable.
Integrity coverage drops from partial (WAL) to zero (SSTable) along the data lifecycle
Depends on (SL): integrity-checking-is-both-incomplete-and-unrecoverable, sstable-layer-compounds-integrity-and-performance-deficiencies