They have built their own storage engine named Redwood, which has some very FoundationDB-specific optimizations (like prefix compression). Check out the "Storag

They have built their own storage engine named Redwood, which has some very FoundationDB-specific optimizations (like prefix compression). Check out the "Storage Servers" section in this doc: https://apple.github.io/foundationdb/architecture.html https://apple.github.io/foundationdb/architecture.html