Provided by: blktrace_1.0.1-2.1_amd64 bug


       blkiomon - monitor block device I/O based o blktrace data


       blkiomon -I interval [ -h file ] [ -b file ] [ -D file ] [ -Q path_name -q msg_queue_id -m
       msg_id ] [ -V ]


       blkiomon is a block device I/O monitor. It periodically generates per-device request  size
       and  request latency statistics from blktrace data. It provides histograms as well as data
       that can be used to calculate min,  max,  average  and  variance.  For  this  purpose,  it
       consumes D and C traces read from stdin.

       There  are options for binary output and human-readable output to files and stdout. Output
       to a message queue is supported as well.

       There is no need to use blkparse with blkiomon. blkiomon is capable  of  consuming  binary
       output written to stdout by blktrace.


       -I interval
              Set sample interval

       -h file
              Human-readable output file. Use '-' for stdout.

       -b file
              Binary output file. Use '-' for stdout.

       -D file
              Output file for debugging data. Use '-' for stdout.

       -Q path_name
              Sets  path_name  as  path  name  for  existing  message queue to be used for binary

       -q msg_queue_id
              Sets msg_queue_id as ID for an existing message queue to be used for binary output.

       -m msg_id
              Sets msg_id as message identifier to be used for binary output messages written  to
              an existing message queue.

              Print program version.


       To  get  I/O  statistics  for  /dev/sdw every 10 seconds for a period of one hour, use the
       following command:

           % blktrace /dev/sdw -a issue -a complete -w 3600 -o - | blkiomon -I 10 -h -


       blkiomon and this man page were written by Martin Peschke.


       Report bugs to <>


       Copyright © 2008 IBM Corp.
       This is free software.  You may redistribute copies of it  under  the  terms  of  the  GNU
       General  Public  License <>.  There is NO WARRANTY, to
       the extent permitted by law.


       btrace (8), blktrace (8), blkparse (1), verify_blkparse (1), blkrawverify (1), btt (1)

                                          July 17, 2008                               BLKIOMON(8)