[rrd-users] the usage of CF

[dophine]

Alex van den Bogaerdt-5 wrote:
> 
> ----- Original Message ----- 
> From: "dophine" <dophinehk at hotmail.com>
> To: <rrd-users at lists.oetiker.ch>
> Sent: Wednesday, September 23, 2009 6:02 PM
> Subject: [rrd-users] the usage of CF
> 
> 
>>
>> Hi all,
>>
>> I have question using CF MAX and LAST. I have 80000 data point for each
>> second.
>> And I plot a chart with the step size 1. However, I found the chart using
>> MAX CF and LAST are different.
>>
>> Does anyone know the reason?
> 
> 
> Step size 1 means 1 second.  You claim to have 80,000 datapoints per
> second, 
> I'm only going to show 5 per second. This is what happens when 5
> datapoints 
> are consolidated into one:
> 
> LAST(10,20,30,20,10)==10
> MAX(10,20,30,20,10)==30
> 
> 
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> 
> 
I am sorry. 1 data point is for one second. That means there are total 80000
seconds data.
As the step size is 1, I expect the MAX and LAST should be the same.
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