Hi [putYourNameHere],
>> DS:rank:GAUGE:604800:0:U
should be "DS:rank:GAUGE:86400:0:U" (means if for more than one day there's no
value delivered for the RRA then rrdtool will create a NaN value)
>> RRA:AVERAGE:0.5:1:7
means: take the average of the last "1" value (which actually is no average,
that's obvoiusly what you want) and store 7 of them (which means you've
collected one weeks values in the first RRA)
>> RRA:AVERAGE:0.5:7:4
means: take the last 7 values, build an average of them and store 4 of those
averages. That would deliver a months (4 weeks) results, each averaged over one
week.
>> RRA:AVERAGE:0.5:30:12
That seems wrong to me. You say to take the last 30 values and average them,
but....there are no 30 values stored. For me it should read like this:
RRA:AVERAGE:0.5:4:12
which takes the last 4 values (you've not held more in the previous RRA),
average them and store 12 averaged values, thus giving you 12 times four weeks
(which isn't a year at all).
Correct me, rrd fellows, if i'm wrong.
Hope this helps,
Thorsten
++
Dipl.-Ing.
Thorsten Volkmer-Wolf
IT-Support & Services
AEROTEC Engineering GmbH
Hein-Saß-Weg 38
21129 Hamburg / Germany
fon +49 (0)40/742 198-241
fax +49 (0)40/742 198-111
<http://www.aerotec.de>
-----Ursprüngliche Nachricht-----
Von: chatiman [mailto:[EMAIL PROTECTED]
Gesendet: Dienstag, 24. Februar 2004 13:40
An: [email protected]
Betreff: [rrd-users] Newbie help
Hello,
I'm tryng to setup rrdtool for a data source which updates not often:
- updates occure at most 1 time per day
- updates occurs at least 1 time each 7 days
- the data source represents the rank of a website
- average graph will be displayed for the last week,
last month and last year
So I 've used the following definition :
rrdcreate <path>
--start <timenow>
--step 86400
DS:rank:GAUGE:604800:0:U
RRA:AVERAGE:0.5:1:7
RRA:AVERAGE:0.5:7:4
RRA:AVERAGE:0.5:30:12
Does it seems correct ?
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