[Orca-users] newbie help rrdtool + orca

[dannyman]

So, I don't know what I'm doing but the man pages are very nice.

I've got Orca set up to graph disk usage on my box (proof of concept before I
get too involved) and things SEEM to be working, except my graphs are empty.

I suspect that this is due to my ignorance about RRDTool.  The way I look at
it, with disks, for example, all I care about is the average.

First, I share configs.  In the first corner, running out of cron every five
minutes, we have diskuse:
#!/usr/bin/perl

$rrddir = "/usr/local/orca/rrds";
$rrdtool = "/usr/local/bin/rrdtool";

open( DF, "/bin/df -k |" ) or die "df: $!";
while( <DF> ) {
        if( /^\/dev\// ) {
                @a = split;
                $a[0] =~ s/^\/dev\///;
                system "$rrdtool create $rrddir/disk-noneedto-$a[0].rrd DS:Used:GAUGE:300:0:U DS:Total:GAUGE:300:0:U RRA:AVERAGE:0.5:1:1200 RRA:AVERAGE:0.5:12:9600" unless -f "$rrddir/disk-noneedto-$a[0].rrd";
                system "$rrdtool update $rrddir/disk-noneedto-$a[0].rrd N:$a[2]:$a[1]";
        }
}

In the other corner, orca.cfg: (abridged)
base_dir                /usr/local/orca
rrd_dir                 rrds
html_dir                /usr/local/www/data/orca
group disk_local {
find_files              /usr/local/orca/rrds/disk-(.*).rrd
column_description      Used Total
date_source             file_mtime
interval                300
}
plot {
title           Disk Use
source          disk_local
data            Used
data            Total
}

So ... and this boggled me for a LONG time before I figured it out, but
it looks like orca is making its own rrd files in subdirectories ... so,
one question is, do I need to maintain an RSA in its source data for
more than, say ... TEN minutes, for Orca to absorb the data and be happy
with it?  (Any wisdon here will be digested appreciatively.)

SECOND question is that so far, my graphs are coming out NaN.  There's
data for about a half hour or so in the
/usr/local/orca/rrds/disk-(.*).rrd files, but, for example, in
noneedto-wd3c/disk_local_noneedto-wd3c_Used.rrd I get:
                        <!-- 2000-05-23 20:30:00 PDT --> <row><v> NaN </v></row>
                        <!-- 2000-05-23 20:35:00 PDT --> <row><v> NaN </v></row>
                        <!-- 2000-05-23 20:40:00 PDT --> <row><v> 0.0000000000e+
00 </v></row>

My thinking here is I should at least get a 0 graph ... though I'd think
the rrdtool dump of disk-noneedto-wd3c.rrd could give me a more juicy graph:
                        <!-- 2000-05-23 20:30:00 PDT --> <row><v> NaN </v><v> Na
N </v></row>
                        <!-- 2000-05-23 20:35:00 PDT --> <row><v> NaN </v><v> Na
N </v></row>
                        <!-- 2000-05-23 20:40:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>
                        <!-- 2000-05-23 20:45:00 PDT --> <row><v> NaN </v><v> Na
N </v></row>
                        <!-- 2000-05-23 20:50:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>
                        <!-- 2000-05-23 20:55:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>
                        <!-- 2000-05-23 21:00:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>
                        <!-- 2000-05-23 21:05:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>
                        <!-- 2000-05-23 21:10:00 PDT --> <row><v> 1.9380883000e+
07 </v><v> 2.6995218000e+07 </v></row>


It DOES appear that Orca is running:
dannyman 25250  0.0  1.7  4936 4472  pn  S+    8:36PM   0:02.59 /usr/bin/perl -
dannyman 26056  0.0  0.2   944  544  pn  S+    8:55PM   0:00.00 grep 25250
/usr/local/bin/orca: internal error: expecting RRD name `disk_local_noneedto-wd0s1f_Total' but no data loaded from `/usr/local/orca/rrds/disk-noneedto-wd0s1f.rrd' at time Tue May 23 20:55:01 2000 (959140501).
/usr/local/bin/orca: internal error: expecting RRD name `disk_local_noneedto-wd0s1f_Total' but no data loaded from `/usr/local/orca/rrds/disk-noneedto-wd0s1f.rrd' at time Tue May 23 20:55:01 2000 (959140501).
dannyman 25250  0.0  1.7  4936 4496  pn  S+    8:36PM   0:02.93 /usr/bin/perl -
dannyman 26355  0.0  0.1   872  228  pn  D+    9:00PM   0:00.00 grep 25250
dannyman 25250  0.0  1.7  4936 4476  pn  S+    8:36PM   0:03.41 /usr/bin/perl -
dannyman 26454  0.0  0.1   308  164  pn  D+    9:05PM   0:00.01 grep 25250
dannyman 25250  0.0  1.7  4936 4460  pn  S+    8:36PM   0:03.42 /usr/bin/perl -
dannyman 26768  0.0  0.1   872  232  pn  R+    9:10PM   0:00.00 grep 25250
dannyman 25250  0.0  1.7  4936 4460  pn  S+    8:36PM   0:03.43 /usr/bin/perl -
dannyman 26856  0.0  0.2   944  544  pn  S+    9:15PM   0:00.00 grep 25250

To be sure, though, the graphs say they were last updated at 8:30.

Thanks in Advance for any help!

-danny

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