.::: Create CDEF's on Cacti to Multiple or Division or other Calculation Mathematical Functions :::.

CDEFs allow you to apply mathematical functions to graph data to alter output. The concept of a CDEF comes straight from RRDTool, and are written in reverse polish notation (RPN). For more information regarding the syntax of CDEFs,

1. Console -> Management -> CDEF's -> New
  Name : Reamur

2. fill CDEF Item
cdef=CURRENT_DATA_SOURCE,4,*,5,/
CDEF Items     Add   
Item     Item Value     
Item #1     Special Data Source: CURRENT_DATA_SOURCE     Move Down Move Up     Delete
Item #2     Custom String: 4     Move Down Move Up     Delete
Item #3     Operator: *     Move Down Move Up     Delete
Item #4     Custom String: 5     Move Down Move Up     Delete
Item #5     Operator: /     Move Down Move Up     Delete

3. Change Graph Template
 Template : PaloAlto - Temperature - Reamur
 Vertical Label (--vertical-label) = Reamur

4. CDEF FUnction = change to Reamur an save

5. additional Associatied graph templeate on device (Temperature reamure) add an save

6. Create Graphs for This Host

7. Select Create: Temperature Reamur and create and create

8. sample graph using CDEF and none

Using CDEF FUnction

Non Using CDEF

  http://informasitips.com/cara-konversi-suhu-dari-celcius-ke-reamur-fahrenheit-dan-kelvin