Graph totals wrong

[milestone]

Hi All,

I have a big Problem with the calculated totals on our In/Out Graphs. As you can see on the attached Screenshot. The monthly total is wrong from the yearly total. In that, the yearly is less than monthly by a lot.

Any help is highly appreciated.

Kind regards

Juergen Hoffmann

[BSOD2600]

This is due to rrdtool consolidating data. Read in the documentation site how this works and what you can do to prevent it.

[milestone]

Hi,

thx for the reply, but what i am saying, the sum function seems to be wrong. because if i do a re-calculation of the average sample...

See the above graph: The Monthly average is 26,93 MBit/s

so to see what the amount of data that was transferred is i am doing
26,93*86400*30/(1024*1024) (count the seconds up to a day and then times day in a month)
that gives me app. 66,57 TB in Total but the graph says the total is 43,27 TB. In my graph_template i have defined the Total as |sum:auto:current:2:auto|

For the yearly graph i am doing
27,32*86400*30*12/(1024*1024) that leaves me with app. 810 TB but the function calculates 22,55 TB

Is my calculation terribly wrong?

I have configured the datasource to be updated every minute.

I have written a proof of concept script, which sums up all the data within the given .rrd file and calculates the sum, and it calculates the correct values. I have dumped the rrd file with rrdtool dump <.rrdfile>

Any help is highly appreciated.

[milestone]

anyone?

[gandalf]

I forwarded this entry to Rony (Tony Roman) who acknowledged it. He will try to contact you to work on this issue.
Reinhard

[milestone]

so far no contact. Could it be that this is a variable data type problem? Like it uses an integer to hold the sum but it has a too low maximum value?

Kind regards

Juergen

[gandalf]

Please PM rony, then
Reinhard

[rony]

Sorry been very busy as of the last 2 months.

Please email me so we can start working on this issue.