linux下监控是否有IO

JDU:/host-001e67a8d50b /log/today # inotifywait -hinotifywait 3.14Wait for a particular event on a file or set of files.Usage: inotifywait [ options ] file1 [ file2 ] [ file3 ] [ ... ]Options:    -h|--help         Show this help text.    @<file>           Exclude the specified file from being watched.    --exclude <pattern>                      Exclude all events on files matching the                      extended regular exPRession <pattern>.    --excludei <pattern>                      Like --exclude but case insensitive.    -m|--monitor      Keep listening for events forever.  Without                      this option, inotifywait will exit after one                      event is received.    -d|--daemon       Same as --monitor, except run in the background                      logging events to a file specified by --outfile.                      Implies --syslog.    -r|--recursive    Watch directories recursively.    --fromfile <file>                      Read files to watch from <file> or `-' for stdin.    -o|--outfile <file>                        Print events to <file> rather than stdout.    -s|--syslog       Send errors to syslog rather than stderr.    -q|--quiet        Print less (only print events).    -QQ               Print nothing (not even events).    --format <fmt>    Print using a specified printf-like format                      string; read the man page for more details.    --timefmt <fmt>    strftime-compatible format string for use with                      %T in --format string.    -c|--csv          Print events in CSV format.        -t|--timeout <seconds>                      When listening for a single event, time out after                      waiting for an event  for <seconds> seconds.                      If <seconds> is 0, inotifywait will never time out.    -e|--event <event1> [ -e|--event  <event2> ... ]        Listen for specific event(s).  If omitted, all events are         listened for.        Exit status:    0  -  An event you asked to watch for was received.    1  -  An event you did not ask to watch for was received    2  -  The --timeout option was given and no events occurred          in the specified interval of time.Events:    access        file or directory contents were read    modify        file or directory contents were written    attrib        file or directory attributes changed        close_write    file or directory closed, after being opened in writable mode    close_nowrite    file or directory closed, after being opened in read-only mode        close        file or directory closed, regardless of read/write mode    open        file or directory opened    moved_to    file or directory moved to watched directory    moved_from    file or directory moved from watched directory        move        file or directory moved to or from watched directory    create        file or directory created within watched directory    delete        file or directory deleted within watched directory    delete_self    file or directory was deleted    unmount        file system containing file or directory unmounted

JDU:aSV/host-001e67a8d50b /sf # inotifywait -rme access,modify,open,close /sf/data/vs_rep2/images/Setting up watches.  Beware: since -r was given, this may take a while!Watches established./sf/data/vs_rep2/images/ OPEN,ISDIR /sf/data/vs_rep2/images/ CLOSE_NOWRITE,CLOSE,ISDIR /sf/data/vs_rep2/images/ OPEN,ISDIR cluster/sf/data/vs_rep2/images/cluster/ OPEN,ISDIR /sf/data/vs_rep2/images/ CLOSE_NOWRITE,CLOSE,ISDIR cluster/sf/data/vs_rep2/images/cluster/ CLOSE_NOWRITE,CLOSE,ISDIR