Asynchronously save the DB on disk.
<p>
Save the DB in background. The OK code is immediately returned. Redis forks, the parent
continues to server the clients, the child saves the DB on disk then exit. A client my be able
to check if the operation succeeded using the LASTSAVE command.
@return Status code reply
Asynchronously save the DB on disk. <p> Save the DB in background. The OK code is immediately returned. Redis forks, the parent continues to server the clients, the child saves the DB on disk then exit. A client my be able to check if the operation succeeded using the LASTSAVE command. @return Status code reply