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



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 the root user or users with the dtrace_kernel  privilege  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 directory. The DTraceToolkit docs may
       include full worked examples with verbose 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(1m)