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 usage:
io stat [-l] [-a] [-m] [-n] [-t] [-d] [-x] [--sa] [--si]: print io statistics
        -l : show summary information (this is the default if -a,-t,-d,-x is not selected)
        -a : break down by uid/gid
        -m : print in <key>=<val> monitoring format
        -n : print numerical uid/gids
        -t : print top user stats
        -d : break down by domains
        -x : break down by application
   --sa : start collection of statistics given number of seconds ago
   --si : collect statistics over given interval of seconds
   Note: this tool shows data for finished transfers only (using storage node reports)
   Example: asking for data of finished transfers which were transferred during interval [now - 180s, now - 120s]:
            eos io stat -x --sa 120 --si 60\n"

io enable [-r] [-p] [-n] [--udp <address>] : enable collection of io statistics
                    -r : enable collection of io reports
                    -p : enable popularity accounting
                    -n : enable report namespace
       --udp <address> : add a UDP message target for io UDP packtes (the configured targets are shown by 'io stat -l)
io disable [-r] [-p] [-n] [--udp <address>] : disable collection of io statistics
                    -r : disable collection of io reports
                    -p : disable popularity accounting
                    -n : disable report namespace
       --udp <address> : remove a UDP message target for io UDP packtes (the configured targets are shown by 'io stat -l)
io report <path> : show contents of report namespace for <path>
io ns [-a] [-n] [-b] [-100|-1000|-10000] [-w] [-f] : show namespace IO ranking (popularity)
            -a :  don't limit the output list
            -n :  show ranking by number of accesses
            -b :  show ranking by number of bytes
          -100 :  show the first 100 in the ranking
         -1000 :  show the first 1000 in the ranking
        -10000 :  show the first 10000 in the ranking
            -w :  show history for the last 7 days
            -f :  show the 'hotfiles' which are the files with highest number of present file opens