95th Percentile Bandwidth Monitoring

Matthew Walker mwalker at kydance.net
Tue May 26 21:44:12 MDT 2009

On Tue, May 26, 2009 9:17 pm, Kenneth Burgener wrote:
> Many data centers bill on the 95th percentile.  Might anyone have a
> suggestion for a good 95th percentile bandwidth monitoring tool?  I
> would prefer one that will take 5 minute snapshots and dump the bit
> rates to a database (the 5 minute interval would also closely match the
> interval to which data centers sample bit rates).  This would enable me
> to programmatically trigger other events.  My firewalls are all Linux
> based iptables systems (fronted with Shorewall).
> I would like to be able monitor our data usage, to make sure we keep our
> 95th percentile at an acceptable level so we don't break the bank.  I
> would like to eventually have an automated script that will trigger, if
> our usage is high for the month, and throttle our bandwidth down.

SNMP + rrdtool should give you everything you need. MRTG can do the graphing for you.

I've used http://www.steveshipway.org/software/index2.html, and it offers 95th
percentile reports, and has configurable 'work hours', that you can use monitor specific
portions of the day.

Matthew Walker
Kydance Hosting & Consulting, Inc. - http://www.kydance.net/
PHP, Perl, and Web Development - Linux Server Administration

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