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A better iostat for Linux

== What it is:

This is a Linux program that reports accurate and trustworthy disk IO stats on a Linux 2.6/3.x machine without either making stats up or lying to you when counter rollover happens. The numbers are taken directly from the kernel statistics.

Information on iostat's problems: http://utcc.utoronto.ca/~cks/space/blog/linux/IostatProblems http://utcc.utoronto.ca/~cks/space/blog/linux/LinuxIowait

Information on what IO stats you get from the kernel and what they mean: http://utcc.utoronto.ca/~cks/space/blog/linux/DiskIOStats

(this information is slightly out of date; in modern 2.6 kernels you can get full stats on a per-partition basis, and mxiostat supports this.)

See mxiostat.1 for a manpage.

=== Bugs:

  • manpage could stand improvement.
  • contains vestigial code that should be removed or in some cases reformed.
  • usage is confusing and complex.

=== Copyright:

GPL v3 for now.