Hey Francisco,
Basically, if you can produce a number from any sort of script (then run via
cron), then it can be graphed with ganglia.
I would take a look at the various scripts people have written in the gmetric
repository, but I'll give you an example here.
This just takes a snapshot of iostat, and parses the output, and then hands it
to gmetric which does all of the work:
#!/bin/sh
CLIENT="/usr/bin/gmetric"
/usr/bin/iostat -x 4 2 /dev/hda1 | grep -v ^$ | tail -4 > /tmp/disk-io.tmp
UTIL=`grep cciss /tmp/disk-io.tmp | awk '{print $14}'`
WRITE=`tail -1 /tmp/disk-io.tmp | awk '{print $9}'`
READ=`tail -1 /tmp/disk-io.tmp | awk '{print $8}'`
IOWAIT=`head -2 /tmp/disk-io.tmp | tail -1 | awk '{print $4}'`
$CLIENT -t uint16 -n diskio-util -v $UTIL -u '%'
$CLIENT -t uint16 -n diskio-write -v $WRITE -u 'wkB/s'
$CLIENT -t uint16 -n diskio-read -v $READ -u 'rkB/s'
$CLIENT -t uint16 -n diskio-iowait -v $IOWAIT -u '%'
good luck,
john
----- Original Message ----
From: Francisco Manuel Delicado Martínez <[EMAIL PROTECTED]>
To: ganglia-list <[email protected]>
Sent: Friday, October 20, 2006 10:53:22 AM
Subject: [Ganglia-general] measuring metrics of applications
Hello,
I want to measure QoS statistics of the applications which are running
in a network, for instance: I have a network with some computers
running a video-conference or voice applications between them. I want
measure the delay of video or voice packets from source to receiver. I
have think that it could be done as follow:
1.- I take sending time of the packet in sender and the reception
time in receiver running two scripts (one in sender and the other in the
receiver) using 'tethereal'.
2.- using gmond and gmetric to measure this new metrics and,
announce the state of them.
3.- I have to program some function to process statistics
before they are been represented in the frontend.
3.1.- I have to subtract the reception time to the
sending one.
3.2.- Calculate average, variance and other
statistical parameters.
My questions are:
1.- Have you done something similar?
2.- Do you think that I could implement that? I have never
used Ganglia.
Best regards.
--
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Francisco M. Delicado Martínez
UCLM
Departamento de Sistemas Informáticos
E.P.S.A. Despacho 0.A.8
Campus Universitario s/n Albacete 02071
Telf:+34-967-599200 ext 2497
Fax: +34-967-599224
e-mail: [EMAIL PROTECTED]
http://www.info-ab.uclm.es/personal/franman/franman.html
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