You're right about the order of variables. It was a typo!.
I tried your recommendation and still I get the error message:
ERROR while updating 21.rrd: expected 2 data source readings (got 576)
The issue is with LOTS of RRDs the performance lags when you create an RRD
and try to fit a months worth of 5 minutes samples into several rrds at once
(converting some raw 5 minutes samples into rrd files). Right now, to do 10
rrd files at 8928 (number of 5 minutes samples in 31 days) takes 10 to 11
seconds. I'm trying to reduce this into a single RRD update perl file in
order to reduce the overall time to convert.
For those who are interested, here is my complete example:
use RRDs;
# 288 = day
# 2016 = 7 days
# 8928 = 31 days
if (! $ARGV[0]) {
print "\n\nNo Arg specified defaulting to 8928 (31 days)\n";
$ARGV[0] = 8928;
}
print "Total Datapoints: $ARGV[0]\n";
foreach (1..10) {
unlink "2${_}.rrd";
RRDs::create ("2${_}.rrd",
"--start","1",
"DS:input:GAUGE:600:U:U",
"DS:output:GAUGE:600:U:U",
"RRA:AVERAGE:0.5:1:600",
"RRA:AVERAGE:0.5:6:700",
"RRA:AVERAGE:0.5:24:775",
"RRA:AVERAGE:0.5:288:797",
"RRA:MAX:0.5:1:600",
"RRA:MAX:0.5:6:700",
"RRA:MAX:0.5:24:775",
"RRA:MAX:0.5:288:797"
);
}
$StartTime = time();
foreach $c (1 .. 10) {
@DataPoints = undef;
foreach $d (1 .. $ARGV[0]) {
$TimeStamp = time() + ($d * 300);
$in = int(rand(1000000));
$out = int(rand(1000000));
push (@DataPoints, "${TimeStamp}:${in}:${out}");
}
#RRDs::update ("2${c}.rrd", @DataPoints);
RRDs::update ("2${c}.rrd", join (" ",@DataPoints));
my $ERR=RRDs::error;
die "ERROR while updating 2${c}.rrd: $ERR\n" if $ERR;
}
$totalTime = time() - $StartTime;
print "total time : $totalTime\n";
I appreciate the help!
Sincerely,
Marc
-----Original Message-----
From: Serge Maandag [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 14, 2005 10:46 AM
To: Marc Bilodeau; rrd-users@list.ee.ethz.ch
Subject: RE: [rrd-users] Re: Adding many data samples at once
> foreach (1..5000) {
> $NewTimeStamp = $baseTime + 300;
> Push (@DataPoints, "ValIn:ValOut:$NewTimeStamp");
> }
shouldn't that be "$NewTimeStamp:ValIn:ValOut" ?
> RRDs::update ("test.rrd", @DataPoints);
>
> The problem is that this will produce an error because it
> tells me that it
> was looking for 2 data points but got 5000 (in this example).
> How can I
> perform this update in 1 rrd update instead of (much slower)
> 5000 updates?
Uhm, perhaps this works?
RRDs::update ("test.rrd", join (" ",@DataPoints));
Serge.
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