[rrd-users] Steps and heartbeats.
kinnardattani at yahoo.com
Fri Aug 26 06:19:40 CEST 2011
I understand that this topic has been posted before - but my understanding
wasn't perfectly clear after reading those posts. Also I read the tutorials
on the website and also those those by Alex - but I still have a doubt as to
how these parameters relate / work with one another. I apologize for the
double posting but I only do so in the interest of clarity. I hope other
newbies like me benefit from this post.
I have created the following rrd database:
rrdtool create test.rrd --start 1314270000 --step 300 --no-overwrite
I then carry out the following updates:
rrdtool update test.rrd 1314270300:1
rrdtool update test.rrd 1314270600:2
rrdtool update test.rrd 1314270900:3
rrdtool update test.rrd 1314271200:4
rrdtool update test.rrd 1314272100:7
rrdtool update test.rrd 1314272400:10
rrdtool update test.rrd 1314274800:5
I then do a fetch:
rrdtool fetch test.rrd AVERAGE
I expected to get the value of 5 at 1314274800 but I get NaN. I understand
that RRDTool does the following before it stores values: Rates,
Normalization, Consolidation. In this case my DS is a GAUGE so it is a rate
- no conversion is required here. I am normalizing stuff every 300 seconds
(step is 300) beginning from the start time of 1314270000. I then have a CF
of AVERAGE that is averaging 1 value. So in this case, I am not really
Can you please elaborate as to why it is so?
I appreciate your time on the matter.
View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/Steps-and-heartbeats-tp6727342p6727342.html
Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com.
More information about the rrd-users