[rrd-users] Re: CDEF - creating a increasing series

[Lars Rune Bjørnevik]

Hi,
You can have a look at a sample display:
http://www.sysit.com/uptime/uptime.htm
 
We query the web server for spesific content, thus chekcing if it's doing somthing senable, rater than using ping...
 
Lars Rune
 
  _____  

From: ciaran deignan [mailto:ciaran.deignan at netcelo.com] 
Sent: 7. september 2004 10:48
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Re: CDEF - creating a increasing series



Lars Rune Bjørnevik wrote: 

>Thanks a million! 
>It works perfect! 
> 
>Actually, this is an uptime display for a web server - not a trafficcounter... ;-) 
>When I query the web, I get 1=up, 0=down 
>A sum of this responce, divided by a sum of "ones" gives the uptime! 
> 
Actually I was using this technique to calculate uptime, but I stopped, 
probably 
because I still don't understand steps and pixel sizes (Alex's 
explanation makes 
my eyes water...) 

Anyhow, my RRD object contains a "time since last ping", and I calculate 
uptime 
using "Average"... 
Here (0 <= PingTime <= 361) - undef means the ping-ing process was absent... 

                DEF:delay=$rrdfile:PingTime:AVERAGE 
                CDEF:invalid=delay,UN 
                CDEF:pin=invalid,100,* 
                CDEF:up=delay,360,LE 
                CDEF:pup=up,100,* 
                CDEF:down=delay,360,GE 
                CDEF:pdown=down,100,* 
                CDEF:ping=down,UNKN,delay,IF 
                LINE3:ping#0000ff:"Response Time" 
                COMMENT:\s 
                GPRINT:pup:AVERAGE:"Up %2.1lf%%" 
                GPRINT:pdown:AVERAGE:"Down %2.1lf%%" 
                GPRINT:pin:AVERAGE:"Untested %2.1lf%%"\r 

hope this helps 
Ciaran 

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