[rrd-users] Please Help

Wed Jun 18 15:09:22 CEST 2008

A couple of things look odd to me, but it could just be because you ran
your update only once. You need to do it a few times in order to see
data in your graph. RRDtool needs more than 1 datapoint to calculate a
rate.

Try a few more rrdtool commands on the command line to see whether there
is something in your rrdfile.  Rrdtool fetch is nice and simple. Try
something like:

rrdtool fetch rrdfile.rrd LAST

If you see a lot of numbers in there -- as opposed to a lot of NaN's
then perhaps it is your graph.

-----Original Message-----
From: Emily Chouinard [mailto:cousin17 at msu.edu] 
Sent: Wednesday, June 18, 2008 9:04 AM
To: Ruttenberg, Tanya
Cc: rrd-users at lists.oetiker.ch
Subject: Re: [rrd-users] Please Help

Ruttenberg, Tanya wrote:
> What do you see when you do "rrdtool info filename"?  You should see 
> some indication that data has gone into it, under last_ds, min, max, 
> or value. Like this:
>
> ds[ifhcinoctets].type = "COUNTER"
> ds[ifhcinoctets].minimal_heartbeat = 1800 =>ds[ifhcinoctets].min = 
> 0.0000000000e+00 =>ds[ifhcinoctets].max = 1.2500000000e+08 
> =>ds[ifhcinoctets].last_ds = "3213871804"
> =>ds[ifhcinoctets].value = 8.3618110390e+02 
> ds[ifhcinoctets].unknown_sec = 0 ds[ifhcoutoctets].type = "COUNTER"
> ds[ifhcoutoctets].minimal_heartbeat = 1800 ds[ifhcoutoctets].min = 
> 0.0000000000e+00 ds[ifhcoutoctets].max = 1.2500000000e+08 
> ds[ifhcoutoctets].last_ds = "417872513"
> ds[ifhcoutoctets].value = 9.3979997545e+01 
> ds[ifhcoutoctets].unknown_sec = 0
>
> I suggest you download and use drraw to take a look at what is in that

> file. This eliminates possible user error in your graph creation AND 
> it will give you the exact rrdfile graph syntax you can use to create 
> the graph.
>
> Good luck.
>
> Tanya Ruttenberg
> SMC/OND Administrator for DNE
> 410-965-9605
>
>
> -----Original Message-----
> From: rrd-users-bounces at lists.oetiker.ch
> [mailto:rrd-users-bounces at lists.oetiker.ch] On Behalf Of Emily 
> Chouinard
> Sent: Wednesday, June 18, 2008 8:52 AM
> To: rrd-users at lists.oetiker.ch
> Subject: [rrd-users] Please Help
>
> I've spent a whole day looking at my code and trying to figure out why

> nothing is being graphed but I can't seem to figure out it, will 
> someone please help me? My code is below and it seems to work, but I 
> don't know if its the update or graph function thats not working, when

> I ls -l all my rrd files and my png seem updated but when I display my

> png it shows the legend and stuff but no values are actually graphed. 
> So any help would be really appreciated.
>    Thanks,
>             Emily
> import rrdtool
> import os
> import time
>
>
> interval = 10
> interval = str(interval)
> interval_mins = float(interval) / 60
> heartbeat = str(int(interval) * 2)
> cur_date = time.strftime('%m/%d/%Y %H\:%M\:%S', time.localtime())
>
> rrdtool.create('usr.rrd',
>          'DS:usr_info:COUNTER:%s:U:U' % heartbeat,
>       'RRA:AVERAGE:0.5:1:%s' % int(4000 / interval_mins),
>      'RRA:AVERAGE:0.5:%d:800' % int(30 / interval_mins),
>      'RRA:AVERAGE:0.5:%d:800' % int(120 / interval_mins),
>            'RRA:AVERAGE:0.5:%d:800' % int(1440 / interval_mins))
>
> rrdtool.create('sys.rrd',
>      'DS:sys_info:COUNTER:%s:U:U' % heartbeat,
>         'RRA:AVERAGE:0.5:1:%s' % int(4000 / interval_mins),
>       'RRA:AVERAGE:0.5:%d:800' % int(30 / interval_mins),
>     'RRA:AVERAGE:0.5:%d:800' % int(120 / interval_mins),
>         'RRA:AVERAGE:0.5:%d:800' % int(1440 / interval_mins))   
>
> rrdtool.create('idle.rrd',
>         'DS:idle_info:COUNTER:%s:U:U' % heartbeat,
>         'RRA:AVERAGE:0.5:1:%s' % int(4000 / interval_mins),
>         'RRA:AVERAGE:0.5:%d:800' % int(30 / interval_mins),
>         'RRA:AVERAGE:0.5:%d:800' % int(120 / interval_mins),
>         'RRA:AVERAGE:0.5:%d:800' % int(1440 / interval_mins))
>
> while True:
>     infile= open('/proc/stat', 'r')
>     #for x in range(0,1): #Reads first line only
>     line = infile.readline()
>     if line.startswith('cpu'): #Check to make sure in 1st line
>     info = line.split()    #Returns a list of the words in the string
>     usr_info = info[1]     #Index the three aspects of CPU Usuage
>     sys_info = info[3]
>     idle_info = info[4]
>      #str() because Python needs to have a string
>         print  usr_info, sys_info, idle_info #Print out so you can see

> what's happening
>     rrdtool.update('idle.rrd','N:112431249')
>     rrdtool.update('sys.rrd','N:108704')
>     rrdtool.update('usr.rrd','N:259845')
>     rrdtool.graph('example.png',
>         'DEF:usr_info=usr.rrd:usr_info:AVERAGE',        #Defines all 
> three aspects of the /proc/stat file
>         'AREA:usr_info#0000FF:"User CPU usuage"',
>         'DEF:sys_info=sys.rrd:sys_info:AVERAGE:step=800',
>         'AREA:sys_info#00FF00:"System CPU usuage":STACK',
>         'DEF:idle_info=idle.rrd:idle_info:AVERAGE:step=800', 
> #Different Labels for each of the three ascp
>             'AREA:idle_info#FF0000:"Idle CPU usuage":STACK',
>         '--start','now-%s'%(30*60),
>         '--end','now',
>         '--width','500',
>         '--height','250',
>         '--base', '1000',
>         '--vertical-label','CPU Usuage',
>         '--title', 'EXAMPLE',
>         'COMMENT:' + cur_date + '')   
>     infile.close()   
>     time.sleep(10)   
>
> _______________________________________________
> rrd-users mailing list
> rrd-users at lists.oetiker.ch
> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
>
>
>   
This is what I see, but I'm not sure what it all means, I am very new to
rrdtool

filename = "usr.rrd"
rrd_version = "0003"
step = 300
last_update = 1213793679
ds[usr_info].type = "COUNTER"
ds[usr_info].minimal_heartbeat = 20
ds[usr_info].min = NaN
ds[usr_info].max = NaN
ds[usr_info].last_ds = "259845"
ds[usr_info].value = 0.0000000000e+00
ds[usr_info].unknown_sec = 0
rra[0].cf = "AVERAGE"
rra[0].rows = 24000
rra[0].pdp_per_row = 1
rra[0].xff = 5.0000000000e-01
rra[0].cdp_prep[0].value = NaN
rra[0].cdp_prep[0].unknown_datapoints = 0 rra[1].cf = "AVERAGE"
rra[1].rows = 800
rra[1].pdp_per_row = 180
rra[1].xff = 5.0000000000e-01
rra[1].cdp_prep[0].value = 0.0000000000e+00
rra[1].cdp_prep[0].unknown_datapoints = 117 rra[2].cf = "AVERAGE"
rra[2].rows = 800
rra[2].pdp_per_row = 720
rra[2].xff = 5.0000000000e-01
rra[2].cdp_prep[0].value = 0.0000000000e+00
rra[2].cdp_prep[0].unknown_datapoints = 297 rra[3].cf = "AVERAGE"
rra[3].rows = 800
rra[3].pdp_per_row = 8640
rra[3].xff = 5.0000000000e-01
rra[3].cdp_prep[0].value = 0.0000000000e+00
rra[3].cdp_prep[0].unknown_datapoints = 2457