head node has an extremely high load average.

[Doll, Margaret Ann]

Thanks.  This sounds like what I need.

On Thu, Jun 27, 2013 at 9:44 AM, Miner, Jonathan W (US SSA) <
jonathan.w.miner at baesystems.com> wrote:

>
> > How does one determine from which node the massive io requests are
> coming?
>
> This falls under network monitoring.  You could use a program like
> "iptraf"; if you run it on the server you should be able to get it to
> display bytes per client, etc.
>
> Or if your switches have snmp monitoring, you could use mrtg to graph the
> per port usage.  Assuming that each port maps to a single device, then
> you'd be able to map high usage back to the client machine.  You could also
> use a snmp monitoring program (Nagios is one...)  to actively alert you if
> usage was above a certain threshold.
>
> https://fedorahosted.org/iptraf-ng/
> http://oss.oetiker.ch/mrtg/
> http://www.nagios.org/
>
> - Jon
>
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