graph with both positive and negative values

[patpro]

Hello,

I want to graph network traffic this way :
- output in green, positive numbers
- input in red, negative numbers

So the result would look a little bit like this: http://ei.kefro.st/projects/rrdtool/traffic.png

I've tweaked input item so that it will feed negative data into the DB (added a -1 "Custom multiplier"), but the graph will only draw positive data (output in my case).
What's wrong ?

[dan.searle]

Negative values woe

Hi,

I'm trying to fix zabbix 1.1.6 to support negative float values as well as positive, can anyone point me in the right direction? I guess I'll have to fix the zabbix server so that it parses negative numbers correctly and stores them in the database items table correctly.

This is a serious problem for me, and by the looks of it a lot of other people. Surely there's an easy fix for this? Surely negative float's and graphing them are not that hard!!!

Dan...

[just4fun]

Hello all,

it's a very old topic, but.... does anyone have a solution for this?

thanks a lot,
christian

[richlv]

maybe you could do that by storing one value with multiplier -1 in zabbix d, but that would break other things like triggers and latest data display.
i'd suggest searching on the zabbix tracker, and, if no issues like that are found, filing a new feature request

[just4fun]

thank's for your answer!

I've alredy tried this but failed... I tried either "unsigned" (which should fail)
and "float" (which should, IMHO, store data signed) but anytime data is stored
as unsigned... can this be related to the fact that I've defined my data
(network traffic on a cicso-switch port) as "delta (speed per second)" ?

christian

[richlv]

how exactly did you try it ? did you also try a multiplier of -1 ?

[just4fun]

sure, that was the first i tried (before playing around with data types

[Zaniwoop]

I have played around with this and gotten it to work. although I can't find the example. I couldn't get it to work on 1.6.x but did on 1.8

I used it to graph in/out traffic, with IN being + and OUT being -

I used a type numeric(float) and used a multiplier of -1.