[mrtg] Hardware requirement for MRTG

Niall O'Reilly Niall.oReilly at ucd.ie
Wed Oct 8 12:14:27 CEST 2008

On Wed, 08 Oct 2008 01:50:44 +0100, Huh, Jin (FXKIS.KOR)  
<jin.huh at kor.fujixerox.com> wrote:

> Please let me know appropreate hardware requirement for MRTG server.

	It depends on how you set things up.  Whatever you use as a
	"standard utility server" will likely do the job.

	Here below is a snapshot of one of our servers.
	We could probably reduce the CPU load and the disk requirement
	for MRTG by using RRD mode instead of traditional rateup mode.

joe(user)25: cat /etc/redhat-release
Red Hat Enterprise Linux ES release 3 (Taroon Update 4)
joe(user)26: fgrep -i mips /proc/cpuinfo
bogomips        : 6383.20
bogomips        : 6396.31
joe(user)27: top -b -n1 | head

  11:03:14  up 316 days, 23:08,  1 user,  load average: 4.35, 3.65, 2.85
290 processes: 289 sleeping, 1 running, 0 zombie, 0 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
            total    0.4%    0.0%    0.4%   0.0%     0.0%    4.8%   94.1%
            cpu00    0.9%    0.0%    0.9%   0.0%     0.0%    0.0%   98.0%
            cpu01    0.0%    0.0%    0.0%   0.0%     0.0%    9.7%   90.2%
Mem:  2055464k av, 2033060k used,   22404k free,       0k shrd,  156492k  
                    1419732k actv,  270440k in_d,   31244k in_c
joe(user)28: service mrtg status | fgrep running | wc -l
joe(user)29: grep '^Target' /usr/local/etc/mrtg/mrtg-*.conf | wc -l
joe(user)30: du -sh /var/local/mrtg
1.3G    /var/local/mrtg

	As you can see, that box has 45 instances of MRTG, covering
	4845 targets.  These include performance figures both from
	network equipment (bit/sec, pkt/sec, etc) and from the local
	server (CPU, disk, DNS query rate, NTP time sync, etc).

	Best regards,

	Niall O'Reilly
	University College Dublin IT Services

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