Hi Alexei,
Thank you very much for taking some of your time to make those changes and
pointing me to them.
I will test those changes and will let you know how it goes.
In the meantime, I have two questions:
1. In NfSenRRD.pm, the change made to line 121 (adding "--step",
$NfConf::CYCLETIME) is not repeated on line 174 which has the exact same code:
when I hardcoded the value for step, I did it on both lines and I wonder if I
had had gone too far by doing this. Your input (or anyone else's) is more than
welcome on this.
2. Also in NfSenRRD.pm on line 99 and 160 (line numbers might vary slightly), I
had hardcoded the heartbeat value in push @DS, "DS:$ds:ABSOLUTE:600:U:U";
to push @DS, "DS:$ds:ABSOLUTE:120:U:U"; . It might be useless
or undesirable: I value your input and advice in advance regarding this as well
.
Thank you again for these changes that go far beyond what I had hardcoded.
Regards,
Yannick
-----Original Message-----
From: Alexei Pastuchov [mailto:i...@maximka.de]
Sent: Wednesday, June 08, 2016 10:26 AM
To: Yannick D'Amboise; nfsen-discuss@lists.sourceforge.net
Subject: Re: [Nfsen-discuss] Unexact results in Shadow profile Statistics
timeslot after changing CYCLETIME value
Hi Yannick,
CYCLETIME is an issue in my case too.
So I patched nfsen implementation and actually graphs in unpatched and patched
versions look absolutely equal.
I think this line could contains a solution you are looking for.
https://github.com/p-alik/nfsen/blob/master/libexec/NfSenRRD.pm#L121
Cheers,
Alexei
> On 02 June 2016 at 22:55 Yannick D'Amboise <yannick.dambo...@exfo.com> wrote:
>
>
> Hi,
>
> As added details, here is my set-up:
>
> - OS: CentOS 7
> - NFSEN: nfsen-1.3.7
> - NFDump: nfdump-1.6.13
>
> I've googled about my issue and found very few things; I've searched
> the mailing list and found only something regarding value that are not
> exact when looking at results in the past but this is expected as data
> is being averaged the further back in time they are. I also found a
> post regarding changing polling interval stating that changing
> CYCLETIME should mostly do it and that NFSen 1.3.7 should already be flexible
> (I'm running 1.3.7).
>
> I've changed all the instance of the hard-coded "300"including
> CYCLETIME value I could find in the in the NFSen directory and looked
> for instances under other possible names without success; if anyone
> can point me to something I missed, I'd be more than happy.
>
> I created a XML file of the content of the RRD using RRDDump to look
> at the data itself and could confirm that there was a variation every
> 60 seconds so my guess is that the config changes I made to
> NfSenRRD.pm were correct; there probably is a better way of getting
> data from the database but I'm new to RRD so please forgive my ignorance.
>
> I also had a look at the logs (/var/log/messages) and I see a lot of
> NFSen NFCapd, etc messages, but no errors.
>
> Please note that I have no experience with Perl nor PHP, my background
> in coding helps me a bit when looking at the code but is somewhat
> limited also so I might have missed something obvious. I've been
> through details.php (in the NFSen WWW folder) and could trace a few
> things but my limited knowledge stops me at some points. I get to the
> following line (1203) in the file:
>
> $_val = ScaleBytes($statinfo['traffic' . $_type], $rateval, 1000.0);
>
> But then I get lost when tracking "$rateval". I find this
>
> $rateval = $_SESSION['tright'] - $_SESSION['tleft'] + $CYCLETIME;
>
> At line 1139, but I'm not able to interpret it. Any hint would be welcome.
>
> Obviously, shadow profiles are really useful as they eat less disk
> space and that's why I'm trying to make this work.
>
> English not being my native language, please excuse any ambiguity.
>
> Thank you very much for your help and support. Any and all help is
> deeply appreciated.
>
> Regards,
>
> Yannick
>
>
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