[collectd] Antwort: Re: WG: Re: rrdcached/collectd ports

Stefan.Wiederoder at kaufland.de Stefan.Wiederoder at kaufland.de
Fri Aug 7 10:50:14 CEST 2009

sorry about the late reply, two weeks holiday and other stuff kept me away 
from my collectd POC.

I´ve started from scratch, built a new collectd client (with rrdtool, and 
all his 3rd party libraries) and
now I´m receiving data using the rrdcached and the plugin (CreateFiles 

Escape character is '^]'.
9 Statistics follow
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UpdatesReceived: 5079825
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UpdatesWritten: 428649
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TreeDepth: 10
JournalBytes: 381923757
JournalRotate: 81

the only thing I´m not sure about are the rrd-files on my central server 
running rrdcached, because
rrdcached will complain if I setup a new host - because he has no data 
files to write to:
        Aug  6 09:31:47 ipmzs02 rrdcached[25924]: handle_request_update: 
do I have to transfer the files initially from my client?

I´m running rrdcached with these options:
/opt/rrdtool_svn/bin/rrdcached -l -l 
unix:/var/run/rrdcached.sock -b /opt/collectd_data -F -j 
/opt/collectd_data/journal -w 60 -F -t 10

I´d grateful about a small rrdcached howto in the wiki, 
Inside_the_RRDtool_plugin is nice to read but
a large scale collectd howto would be really great.

Florian Forster <octo at verplant.org> 
Gesendet von: collectd-bounces at verplant.org
06.07.2009 13:04

Stefan.Wiederoder at kaufland.de

collectd at verplant.org
Re: [collectd] WG: Re:  rrdcached/collectd ports

Hi Stefan,

On Mon, Jun 29, 2009 at 02:36:50PM +0200, Stefan.Wiederoder at kaufland.de 
> now I´v got my collectd client sending data using the rrdcached plugin
> to my central server (verified using tcpdump), but rrdcached is not
> writing any data to disk.

> LoadPlugin rrdcached
> <Plugin "rrdcached">
>   DaemonAddress ""
>   DataDir "/opt/collectd/var/lib/collectd/"
>   CreateFiles false
> </Plugin>

if you set the `CreateFiles' option to `false', only existing files will
be updated by the daemon. Do those files exist?

Could you please provide a PCAP file (the output file format of tcpdump)
of some network traffic between collectd and rrdcached? That way it'd be
easier to understand what's really going on.

Florian octo Forster
Hacker in training
GnuPG: 0x91523C3D
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