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iofileb.d(1)                    USER COMMANDS                   iofileb.d(1)




NAME

       iofileb.d - I/O bytes by file and process. Uses DTrace.


SYNOPSIS

       iofileb.d


DESCRIPTION

       This prints a summary of requested disk activity by pathname, providing
       totals of the I/O events in bytes. It is a companion  to  the  iofile.d
       script  -  which prints in terms of I/O wait time, not bytes.  I/O wait
       time is a better metric for  understanding  performance  issues.   Both
       disk and NFS I/O are measured.

       Since  this  uses  DTrace, only users with root privileges can run this
       command.


EXAMPLES

       Sample until Ctrl-C is hit then print report,
              # iofileb.d



FIELDS

       PID    process ID

       CMD    process name

       KB     kilobytes of disk I/O

       FILE   file pathname



DOCUMENTATION

       See the DTraceToolkit for further documentation under the  Docs  direc-
       tory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.


EXIT

       iofileb.d will sample until Ctrl-C is hit.


SEE ALSO

       iofile.d(1M), iosnoop(1M), dtrace(1M)



version 1.00                     Feb 20, 2006                    iofileb.d(1)

Mac OS X 10.6 - Generated Thu Sep 17 20:07:55 CDT 2009
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