[rrd-users] Getting confused ...

[FAIDHERBE Thierry]

Using different versions of rrdtool on windows 7 x64 platform, I faced this
and 

I cannot understand the reason : the max or current printed values does not
always

match updated data :

 

 

Let’s take an example :

 


 creating the db file :

rrdtool.exe create temp.rrdtool-db -b 1501538399 

       DS:SERIE:GAUGE:86400:U:U  

       RRA:LAST:0.5:288:10

 


 updating data :

rrdtool.exe update temp.rrdtool-db -t SERIE  1501624799:0 1501711199:0
1501797599:0 

       1501883999:0 1501970399:0 1502056799:0 1502143199:0 1502229599:0
1502315999:176

 


 graphing :

rrdtool.exe graph Change.png  -a PNG --start 1501538399 -F --step 300  -l 0 

       -h 200 -v "Count" -w 800 -r -b 1000 

       DEF:DS=temp.rrdtool-db:SERIE:LAST 

       AREA:DS#0000FF:"Change" 

       GPRINT:DS:MAX:" Max \: %10.0lf " 

       GPRINT:DS:LAST:" Current \: %10.0lf \n"

 

The graph is generated. Looking at graph, the Current and max vals are 175 

(should be 176)

 

 

new one :

 


 creating the db file :

rrdtool.exe create temp.rrdtool-db -b 1501538399 

       DS:SERIE:GAUGE:86400:U:U  

       RRA:LAST:0.5:288:10

 


 updating data :

rrdtool.exe update temp.rrdtool-db -t SERIE  1501624799:0 1501711199:0
1501797599:0 

       1501883999:0 1501970399:0 1502056799:0 1502143199:0 1502229599:0
1502315999:176

       1502402399:1495

 


 graphing :

rrdtool.exe graph Change.png  -a PNG --start 1501538399 -F --step 300  -l 0 

       -h 200 -v "Count" -w 800 -r -b 1000 

       DEF:DS=temp.rrdtool-db:SERIE:LAST 

       AREA:DS#0000FF:"Change" 

       GPRINT:DS:MAX:" Max \: %10.0lf " 

       GPRINT:DS:LAST:" Current \: %10.0lf \n"

 

The graph is generated. Looking at graph, the Current and max vals are 1490

. (should be 1495)

 

 

Where am I wrong ? What did I wrong ???

 

Thanks for your lights, I am clueless 


 

Cheers

 

Th

 

 

Kind regards - Bien cordialement - Vriendelijke groeten,

 

Thierry FAIDHERBE

Backup/Storage & System Management

 

LE FOREM

Département des Systèmes d'Information, Direction Infrastructure

 

Boulevard Tirou, 104  Tel:    +32 (0)71/206730

B-6000 CHARLEROI      Mobile: +32 (477)/995319 

BELGIUM               Mail : Thierry.faidherbe<at>forem.be

 

"The urgent is done, the impossible is being processed ... For miracles
Allow time".

"Nowadays, people know the price of everything and the value of nothing",
Oscar Wilde

"The future belongs to those who believe in the beauty of their dreams",
Eleanor Roosevelt

"Courage is not having the strength to go on; 

        it is going on when you don't have the strength.", Theodore
Roosevelt

 

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