[mrtg] Minimum hardware

thomaz portella thomazp at gmail.com
Thu Jun 2 20:34:37 CEST 2016

Look this server I thought:
Look this configuration I assembled.

2x XEON CPUs (single core).
4x 73GB SCSI HDs (RAID10)
Red Hat
CA eHealth
EMC SAN (I forgot, We Can use this storage)
From: mrtg <mrtg-bounces+dan.mcdonald=austinenergy.com at lists.oetiker.ch> on
behalf of thomaz portella <thomazp at gmail.com>

I am reading the necessity of using RRDtool together with mrtg.

Yes.  Rrdtool scales much greater than rateup.

Which benefits will I have using it or not ?

Greater granularity (up to millisecond precision if you were to poll that
often) as opposed to fixed at 5 minute polling cycle.
Support for negative numbers (for example, temperature sensors or dB meters)
Faster update times - just updating a database that is designed to
consolidate daily/weekly/monthly/yearly views rather than fiddling with
flat files that take a long time to parse and rewrite.
Less up-front processing.  Rateup creates a graph on every polling cycle.
Rrdtool just updates the data and lets you create the graphs at time of
view, leading to much lower cpu utilization.
More flexible graphs - rrdtool gives you almost limitless formatting
capabilities and combined metrics, while rateup just creates one style of

I need an external database or could be embedded ?

Not for rateup.  You may want one if you are tracking 100’s of switches.
Large sites generally set up mrtg configs for each switch as a separate
file, and then include them all from a master mrtg.cfg file that just
contains include statements from all of the switches.

For example, I have about 700 devices, all with unique snmp credentials.  I
have a database that lists the credentials, as well as which template
should be applied to each device.  I have a script that will check to see
which devices are reachable, create a mrtg.cfg file with all of those
config files included, and also put together a script to run mkconfig for a
subset of the devices that are being managed.

Tks ,
On Jun 2, 2016 11:16 AM, "thomaz portella" <thomazp at gmail.com> wrote:

> We don't need to monitor these servers the number I sent.
> We need to follow the network elements(switches and routers) behaviour .
> We have approximately 100 of this . I couldn't sent this number before
> because I didn't have it.
> I have to know an idea of the server I need, to ask here
> Tks
> On Jun 1, 2016 6:57 PM, "thomaz portella" <thomazp at gmail.com> wrote:
>> 2500 RH boxes:
>> 1000 physical
>> 1500 Virtual
>> When I asked, the person could tell me how many switches was out, but I
>> can ask this tomorrow.
>> Any other question will be answered if necessary.
>> Thanks,
>> On Jun 1, 2016 5:59 PM, "Wm. Josiah Erikson" <wjeNS at hampshire.edu> wrote:
>>> 2500 Red Hat boxes or 2500 switches? Do you mean analyze or just poll
>>> traffic data? Please describe your environment and exactly what you want to
>>> analyze more thoroughly.
>>> On June 1, 2016 4:23:13 PM EDT, thomaz portella <thomazp at gmail.com>
>>> wrote:
>>>> I need to configure a mrtg server to analyze my network.
>>>> We have approx 2500 machines, and use Red Hat.
>>>> Any other question, I can ask here.
>>>> I need to know the minimum hardware needed.
>>>> Tks
>>>> ------------------------------
>>>> mrtg mailing list
>>>> mrtg at lists.oetiker.ch
>>>> https://lists.oetiker.ch/cgi-bin/listinfo/mrtg
>>> --
>>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
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