question: public static UUID generateLegacyCfId ( String ksName , String cfName ) { return UUID . nameUUIDFromBytes ( ArrayUtils . addAll ( ksName . getBytes ( ) , cfName . getBytes ( ) ) ) ; }
target:  Generates deterministic UUID from keyspace/columnfamily name pair. This is used to generate the same UUID for C* version < 2.1 Since 2.1, this is only used for system columnfamilies and tests.