[rrd-users] Are Multiple "Absolute" Updates per period cumulative?

[Phil Henningsen]

Hello to All!

First, I'm a newbie at RRDTool.  I've viewed MRTG a lot.
Now I'm trying to implement my own.

Environment: Windows NT (SP6a)
Time: Pacific Daylight Time = GMT - 7:00

I'm trying to convert 2 years of old "log" files that
are in the format:
   <time_stamp> = <value_done_since_last_time_stamp>
The <time_stamps> are at approximately 1 minute intervals.


Here is a simple "test" .BAT file:

set rrdt=D:\Apps\Web\RRDTool\

%rrdt%rrdtool create maillog.rrd --start 964335600 ^
   DS:emails:ABSOLUTE:600:U:U ^
   RRA:AVERAGE:0.5:1:10

%rrdt%rrdtool update maillog.rrd ^
   964335997:16 964336072:07 964336135:13 964336197:07 ^
   964336270:18 964336370:15 ^
   964336549:22 964336616:37 964336681:17 964336744:18 ^
   964336847:11 964336914:24 964336979:17 964337045:07

%rrdt%rrdtool fetch maillog.rrd AVERAGE ^
   --start 964335600 --end 964337100

The output of the "fetch" is: (// are comments)

  964335600: -1.#IND000000e+000  // 7/23/00 00:00:00
  964335900:  4.0302267003e-002  // 00:05  Sum=43 Avg/sec=0.1433
  964336200:  1.0549681976e-001  // 00:10  Sum=33 Avg=0.1100
  964336500:  1.6079309201e-001  // 00:15  Sum=94 Avg=0.3133
  964336800:  2.8000976298e-001  // 00:20  Sum=59 Avg=0.1966
  964337100: -1.#IND000000e+000

The problem is that the AVERAGEs (and the Graphs) are not
even close to what I calculate / expect.

What am I doing wrong here?

Many thanks for your help.

Phil Henningsen







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