blkiomon man page on Oracle

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BLKIOMON(8)							   BLKIOMON(8)

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

       blkiomon	 -I interval [ -h file ] [ -b file ] [ -d 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.	Note, that this doesn't work for logical  vol‐
       umes, as high-level drivers don't see the completion of the events (C).

       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 data emitted by low level device driver.

       -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 output.

       -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), blkrawver‐
       ify (1), btt (1)

				 July 17, 2008			   BLKIOMON(8)

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