I saw a 'gmetad' running on your head node, which means you're running ganglia. You can probably monitor your NFS traffic client-side on each node and have ganglia collect that information. Just keep in mind, your CPU load doesn't look that unusual for a NFS server with many nodes running jobs writing to it. You said you had 10 nfsd threads, and your top output above said there were 3 tasks running on a 2-core system, with a load average between 13 and 14. Sounds about right. Don't focus on the load average, you'd be better off trying to improve storage and network speed. For example, I suggest installing the 'tuned' package and enable the 'enterprise-storage' profile (with tuned-adm). That will change the scheduler elevator algorithm as well as a bunch of sysctl items to something optimized for storage. On Thu, Jun 27, 2013 at 9:48 AM, Doll, Margaret Ann <margaret_doll@xxxxxxxxx > wrote: > Thanks. This sounds like what I need. > > On Thu, Jun 27, 2013 at 9:44 AM, Miner, Jonathan W (US SSA) < > jonathan.w.miner@xxxxxxxxxxxxxx> 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 > > > > -- > > redhat-list mailing list > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > https://www.redhat.com/mailman/listinfo/redhat-list > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- Jonathan Billings <jsbillin@xxxxxxxxx> College of Engineering - CAEN - Unix and Linux Support -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
