<div class="gmail_quote">---------- Forwarded message ----------<br>From: "Freddie Cash" <<a href="mailto:fjwcash@gmail.com">fjwcash@gmail.com</a>><br>Date: Jun 1, 2016 9:06 PM<br>Subject: Re: [mrtg] Minimum hardware<br>To: "thomaz portella" <<a href="mailto:thomazp@gmail.com">thomazp@gmail.com</a>><br>Cc: <br><br type="attribution"><p dir="ltr">I run a monitoring server using 2x Xeon CPUs (single core) and 7 GB of RAM, with 4x 76 GB SCSI disks in hardware RAID10, running Debian 7, MRTG, Routers2, Nagios, and LibreNMS.</p>
<p dir="ltr">MRTG polls around 300 hosts, graphing all NICs, disks, CPUs, RAM, load averages, and a few other one-offs like SMTP queues. Everything stored in rrd files via rrdcached. Some things like NICs are polled every minute. Some things like CPU and RAM are polled every 5 minutes. Others like storage usage every 15 minutes. Depends on how often the thing being polled changes.</p>
<p dir="ltr">Routers2 does the displaying.</p>
<p dir="ltr">Nagios does all the host, network, connectivity, and service monitoring for the above hosts, polling every 5 minutes, including another 100 or so devices.</p>
<p dir="ltr">And we've started to move things into LibreNMS for more in-depth monitoring, polling just about everything with a MIB every 5 minutes (currently 524 hosts/devices).</p>
<p dir="ltr">We're just starting to hit disk and CPU bottlenecks on that box. I'm in the process of moving it to an 8-core Opteron box with 32GB of RAM and 8 SATA disk in software raid10. Once that is done, MRTG/Routers2 will be replaced completely by LibreNMS and another 1000+ switches will be added.</p>
<p dir="ltr">If that supports the load, then we'll look into adding approx 5000 Linux stations, spread across 40-odd locations, as well. At that point, we may consider using the server in each building as a distributed poller, getting everything back via rrdcached and memcached.</p>
<p dir="ltr">It all depends on how many targets you'll be querying and how fast your disk setup is that determines how much hardware is needed. :)</p>
</div>