The changes above will work only on newly created RRDs, not on existing
ones. You would need to delete and recreate the rrd files to get the better
accuracy, or use rrdtool to move your data to new rrd files so that from
now on newly collected data will retain the accuracy.
On Thu, Oct 18, 2012 at 11:48 AM, Jan Pazdera <pazd...@invea.cz> wrote:
> **
> Hi,
>
> its because RRD database is configured to store values older than 30 days
> with longer granularity. You can modify the granularity in NfSenRRD.pm by
> changing the following function. Than reload nfsen. Than new created
> profiles will be stored for 6 months with 5 minutes granularity. The size
> of RRD database will increase to 15MB.
>
> sub SetupRRD {
>
> my $path = shift;
> my $db = shift;
> my $start = shift;
> my $force = shift;
>
> $Log::ERROR = undef;
> my @DS;
> foreach my $ds ( @RRD_DS ) {
> push @DS, "DS:$ds:ABSOLUTE:600:U:U";
> }
>
> my $ERR;
>
> # Create the RRD DB only if it not exists, or we are forced
> # to delete the old one, and create a new one
> unlink "$path/$db.rrd" if $force;
> if ( -f "$path/$db.rrd" ) {
> print "RRD DB '$db.rrd' already exists!\n";
> return;
> }
>
> # New RRD DB layout:
> # 1 x 5min = 5 min samples 6 * 30 * 288 = 51840 => 6 * 30 days
> # 6 x 5min = 30 min samples 6 * 30 * 48 = 8640 => 6 * 30 days
> # 24 x 5min = 2 hour samples 6 * 30 * 12 = 2160 => 6 * 30 days
> # 288 x 5min = 1 day samples 5 * 365 * 1 = 1825 => 5 * 365 days
> # RRD DB layout:
> # 1 x 5min = 5 min samples 30 * 288 ( per day ) = 8640 => 30
> days
> # 6 x 5min = 30 min samples 30 * 48 ( per day ) = 1440 => 30
> days
> # 24 x 5min = 2 hour samples 30 * 12 ( per day ) = 360 => 30
> days
> # 288 x 5min = 1 day samples 700 * 1 ( per day ) = 700 => 700
> days
> # Total data available 790 days
> my $old_umask = umask 0002;
> my $rrd_filename = "$path/$db.rrd";
> RRDs::create ( $rrd_filename, "--start", $start,
> @DS,
> "RRA:AVERAGE:0.5:1:51840",
> "RRA:AVERAGE:0.5:6:8640",
> "RRA:AVERAGE:0.5:24:2160",
> "RRA:AVERAGE:0.5:288:1825",
> "RRA:MAX:0.5:1:51840",
> "RRA:MAX:0.5:6:8640",
> "RRA:MAX:0.5:24:2160",
> "RRA:MAX:0.5:288:1825"
> );
> # RRDs::create ( $rrd_filename, "--start", $start,
> # @DS,
> # "RRA:AVERAGE:0.5:1:8640",
> # "RRA:AVERAGE:0.5:6:1440",
> # "RRA:AVERAGE:0.5:24:360",
> # "RRA:AVERAGE:0.5:288:700",
> # "RRA:MAX:0.5:1:8640",
> # "RRA:MAX:0.5:6:1440",
> # "RRA:MAX:0.5:24:360",
> # "RRA:MAX:0.5:288:700"
> # );
> umask $old_umask;
>
> $ERR=RRDs::error;
> if ( $ERR ) {
> $Log::ERROR = "ERROR while creating RRD DB $db.rrd: $ERR";
> }
> # System Errors are not reported detailed enough, so report system
> errno, if
> # file does not exists or is empty
> if ( !-f $rrd_filename || -z $rrd_filename ) {
> my $err = $!;
> warn "Unable to create DB file: $err\n";
> if ( !defined $Log::ERROR) {
> $Log::ERROR = "Unable to create DB file: $err";
> }
> }
>
> } # End of SetupRRD
>
>
> Jan
>
> Jan Pazdera <pazdera at invea.cz>
> INVEA-TECH a.s.
> U Vodarny 2965/2, 61600 Brno, Czech Republic
> Tel: +420 511 205 251www.invea-tech.com
> Key 0x89F62F78: 41A7 28C2 C624 FBD1 E236 6827 42EB 3694 89F6 2F78
>
>
>
> On 18.10.2012 10:29, Arnaud Lauriou wrote:
>
> Hello,
>
> We use nfsen 1.3.6p1.
>
> When displaying graph older than one month, nfsen is generating wrong data.
>
> Examples for the live profile when looking at 09/16/2012 day (generated
> graph is attached) :
> - nfcap files are presents
> - live profile never expire
> - nfdump is still working on those data
> - No error fond in the apache log file when those graphs are generated
>
> Do you have an idea why graphs older than one month are badly generated ?
>
> Regards,
>
> Arnaud
>
>
>
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>
>
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