log_file log_date log_time ocn year
ocn.log.150507-013832   150507    13832        1
ocn.log.150507-054629   150507    54629        0
ocn.log.150507-111257   150507   111257        5
ocn.log.150507-225509   150507   225509       20
ocn.log.150508-095223   150508    95223       35
ocn.log.150508-203313   150508   203313       50
ocn.log.150509-102400   150509   102400       65
ocn.log.150509-235031   150509   235031       80
ocn.log.150510-104406   150510   104406       95
ocn.log.150511-021400   150511    21400      110