Provided by: ioping_0.6-1_amd64 bug

NAME

       ioping - simple disk I/O latency monitoring tool

SYNOPSYS

       ioping [-LCDRq] [-c count] [-w deadline] [-p period] [-i interval] [-s size] [-S wsize]
              [-o offset] device|file|directory

       ioping -h | -v

DESCRIPTION

       This tool lets you monitor I/O latency in real time.

OPTIONS

       -c count
              Stop after count requests.

       -w deadline
              Stop after deadline time passed.

       -p period
              Print raw statistics for every period requests.

       -i interval
              Set time between requests to interval (1s).

       -s size
              Request size (4k).

       -S size
              Working set size (1m).

       -o offset
              Offset in input file.

       -L     Use sequential operations rather than random. This also sets request size  to  256k
              (as in -s 256k).

       -C     Use cached I/O.

       -D     Use direct I/O.

       -R     Disk seek rate test (same as -q -i 0 -w 3 -S 64m).

       -q     Suppress human-readable output.

       -h     Display help message and exit.

       -v     Display version and exit.

   Argument suffixes
       For  options that expect time argument (-i and -w), default is seconds, unless you specify
       one of the following suffixes (case-insensitive):

       us, usec
              microseconds

       ms, msec
              milliseconds

       s, sec seconds

       m, min minutes

       h, hour
              hours

       For options that expect "size" argument (-s, -S and -o),  default  is  bytes,  unless  you
       specify one of the following suffixes (case-insensitive):

       s      disk sectors (a sector is always 512).

       k, kb  kilobytes

       p      memory pages (a page is always 4K).

       m, mb  megabytes

       g, gb  gigabytes

       t, tb  terabytes

       For  options  that  expect "number" argument (-p and -c) you can optionally specify one of
       the following suffixes (case-insensitive):

       k      kilo (thousands, 1 000)

       m      mega (millions, 1 000 000)

       g      giga (billions, 1 000 000 000)

       t      tera (trillions, 1 000 000 000 000)

EXIT STATUS

       Returns 0 upon success. The following error codes are defined:

       1      Invalid usage (error in arguments).

       2      Error during preparation stage.

       3      Error during runtime.

EXAMPLES

       ioping .
              Show disk I/O latency using the default values and  the  current  directory,  until
              interrupted.

       ioping -c 10 -s 1M /tmp
              Measure latency on /tmp using 10 requests of 1 megabyte each.

       ioping -R /dev/sda
              Measure disk seek rate.

       ioping -RL /dev/sda
              Measure disk sequential speed.

SEE ALSO

       Homepage ⟨http://code.google.com/p/ioping/⟩.

AUTHORS

       This program was written by Konstantin Khlebnikov ⟨koct9i@gmail.com⟩.
       Man-page was written by Kir Kolyshkin ⟨kir@openvz.org⟩.

                                            July 2011                                   IOPING(1)