[rrd-users] [GRAYMAIL] Re: RE: RE: Question about trend line

[Steve Clark]

On 08/13/2015 09:07 AM, Robert C. Seiwert wrote:
> LSL trending is only good for trending linear data. I have trend lines on all my graphs by default and find them useful even when the data is not linear.
> If the data you are trending is total MB in the last 30 days until you get over 30 days of data the trend will be invalid.
>
> Vnstat is great and setting an hrule from the estimate is a great idea. If it were me I would still put a LSLTrend line on the graph just as an aid.
Does anyone know or understand the algorithm vnstat uses to do its prediction?

> -----Original Message-----
> From: rrd-users [mailto:rrd-users-bounces+rob=vcaglobal.com at lists.oetiker.ch] On Behalf Of Ondrej
> Sent: Thursday, August 13, 2015 7:36 AM
> To: rrd-users at lists.oetiker.ch
> Subject: [GRAYMAIL] Re: [rrd-users] RE: RE: Question about trend line
>
> Thank you again for great explanation. My graph shows total consumed data on
> WAN0 interface, so not units/sec but total Megabytes that went over this interface in range of 30 days.
>
> Reading all this about LSL* I think I should maybe reconsider using LSL functions here and find another way of predicting.
>
> vnstat linux tool gives me prediction that if far different than LSL* ( 9.81 GiB currently is predicted whereas LSL gives almost 12GiB.)
>
> Maybe using HRULE and the predicted value from vnstat would be a direction.
>
>
>
>
>
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-- 
Stephen Clark
*NetWolves Managed Services, LLC.*
Director of Technology
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