all the operations are performed. An exception to this rule is when the Append Only File is enabled: every command that is part of a Redis transaction will log in the AOF as long as the operation is completed, so if the Redis server crashes or is killed by the system administrator in some hard way it is possible that only a partial number of operations are registered.</li></ul>
Since Redis 2.1.0, it's also possible to add a further guarantee to the above two, in the form of optimistic locking of a set of ke