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

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


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.

# iofileb.d

process ID
process name
kilobytes of disk I/O
file pathname

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output.

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

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

February 20, 2006 version 1.00