Performance statistics aggregation

[Clint Byrum]

Excerpts from Nicolas Barcet's message of Thu Jun 16 08:02:37 -0700 2011:
> I think it would be good to have the server community's opinion on what
> should be our preferred performance statistics aggregation solution in
> Ubuntu.  The 2 main contenders would be ganglia [1] and collectd [2],
> but something even better might be out there that I do not know about.
> 
> [1] http://ganglia.sourceforge.net/
> [2] http://collectd.org/

I still like collectd because it is focused heavily on making *collecting*
the data easy, and de-couples itself from presenting the data.

That said, ganglia is pretty good for that as well.

This one is also pretty slick:

https://labs.omniti.com/labs/reconnoiter

Last I checked it was not in Debian or Ubuntu, so it should be packaged
for sure.

I'm not sure we need to pick one.. right now munin is in main because its
the one that was most respected at the time. It has lost favor because it
really can't scale past 100 nodes, but that doesn't mean users aren't
very well served by it.