[collectd] Problem with plugin-libvirt

[richard -rw- weinberger]

Hi!

I'm using collectd 4.10.3 and the libvirt plugin.
The produced rrd files contains quite strange values.

Here the first few lines from rrdinfo dump.

Why is the first clolumn (read) always 0?

I can confirm that the last_ds values are correct, I've verified it using virsh.
But all other values make absolutely no sense.

---cut---
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE rrd SYSTEM "http://oss.oetiker.ch/rrdtool/rrdtool.dtd">
<!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
        <step> 10 </step> <!-- Seconds -->
        <lastupdate> 1325357456 </lastupdate> <!-- 2011-12-31 19:50:56 CET -->

        <ds>
                <name> read </name>
                <type> COUNTER </type>
                <minimal_heartbeat> 20 </minimal_heartbeat>
                <min> 0.0000000000e+00 </min>
                <max> 1.7179869183e+10 </max>

                <!-- PDP Status -->
                <last_ds> 21385290752 </last_ds>
                <value> 0.0000000000e+00 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

        <ds>
                <name> write </name>
                <type> COUNTER </type>
                <minimal_heartbeat> 20 </minimal_heartbeat>
                <min> 0.0000000000e+00 </min>
                <max> 1.7179869183e+10 </max>

                <!-- PDP Status -->
                <last_ds> 7545725952 </last_ds>
                <value> 2.2118400000e+04 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

<!-- Round Robin Archives -->   <rra>
                <cf> AVERAGE </cf>
                <pdp_per_row> 1 </pdp_per_row> <!-- 10 seconds -->

                <params>
                <xff> 1.0000000000e-01 </xff>
                </params>
                <cdp_prep>
                        <ds>
                        <primary_value> 0.0000000000e+00 </primary_value>
                        <secondary_value> 0.0000000000e+00 </secondary_value>
                        <value> NaN </value>
                        <unknown_datapoints> 0 </unknown_datapoints>
                        </ds>
                        <ds>
                        <primary_value> 3.9321600000e+03 </primary_value>
                        <secondary_value> 0.0000000000e+00 </secondary_value>
                        <value> NaN </value>
                        <unknown_datapoints> 0 </unknown_datapoints>
                        </ds>
                </cdp_prep>
                <database>
                        <!-- 2011-12-31 16:31:00 CET / 1325345460 -->
<row><v> 0.0000000000e+00 </v><v> 4.0140800000e+03 </v></row>
                        <!-- 2011-12-31 16:31:10 CET / 1325345470 -->
<row><v> 0.0000000000e+00 </v><v> 5.2428800000e+03 </v></row>
                        <!-- 2011-12-31 16:31:20 CET / 1325345480 -->
<row><v> 0.0000000000e+00 </v><v> 4.7513600000e+03 </v></row>
                        <!-- 2011-12-31 16:31:30 CET / 1325345490 -->
<row><v> 0.0000000000e+00 </v><v> 4.0140800000e+03 </v></row>
                        <!-- 2011-12-31 16:31:40 CET / 1325345500 -->
<row><v> 0.0000000000e+00 </v><v> 3.7683200000e+03 </v></row>
                        <!-- 2011-12-31 16:31:50 CET / 1325345510 -->
<row><v> 0.0000000000e+00 </v><v> 4.0140800000e+03 </v></row>
                        <!-- 2011-12-31 16:32:00 CET / 1325345520 -->
<row><v> 0.0000000000e+00 </v><v> 3.9321600000e+03 </v></row>
                        <!-- 2011-12-31 16:32:10 CET / 1325345530 -->
<row><v> 0.0000000000e+00 </v><v> 4.8332800000e+03 </v></row>
                        <!-- 2011-12-31 16:32:20 CET / 1325345540 -->
<row><v> 0.0000000000e+00 </v><v> 4.4236800000e+03 </v></row>
                        <!-- 2011-12-31 16:32:30 CET / 1325345550 -->
<row><v> 0.0000000000e+00 </v><v> 4.0140800000e+03 </v></row>
                        <!-- 2011-12-31 16:32:40 CET / 1325345560 -->
<row><v> 0.0000000000e+00 </v><v> 3.7683200000e+03 </v></row>
                        <!-- 2011-12-31 16:32:50 CET / 1325345570 -->
<row><v> 0.0000000000e+00 </v><v> 4.1779200000e+03 </v></row>
                        <!-- 2011-12-31 16:33:00 CET / 1325345580 -->
<row><v> 0.0000000000e+00 </v><v> 4.5875200000e+03 </v></row>
                        <!-- 2011-12-31 16:33:10 CET / 1325345590 -->
<row><v> 0.0000000000e+00 </v><v> 4.8332800000e+03 </v></row>
---cut---

-- 
Thanks,
//richard