Return the UNIX time stamp of the last successfully saving of the dataset on disk.
<p>
Return the UNIX TIME of the last DB save executed with success. A client may check if a
{@link #bgsave() BGSAVE} command succeeded reading the LASTSAVE value, then issuing a BGSAVE
command and checking at regular intervals every N seconds if LASTSAVE changed.
@return Integer reply, specifically an UNIX time stamp.
Return the UNIX time stamp of the last successfully saving of the dataset on disk. <p> Return the UNIX TIME of the last DB save executed with success. A client may check if a {@link #bgsave() BGSAVE} command succeeded reading the LASTSAVE value, then issuing a BGSAVE command and checking at regular intervals every N seconds if LASTSAVE changed. @return Integer reply, specifically an UNIX time stamp.