Compatability with RRD Data Sources?

Your absolutely right, we even have a lot of RRD data of our own and since Graphite originally used RRD the support is still there for reading RRD files. In the Graphite storage directory there is an empty rrd/ subdirectory. Copy or symlink any directories containing your existing RRD files to be underneath this directory and they will become available in Graphite transparently. The only caveat is that you must have the python rrdtool bindings installed (test by running 'import rrdtool' from a python prompt). Note however that it is not possible to update RRD files with Graphite, as all updates are done to whisper database files.

Awesome, got an rrddump recipe for converting a rrd data store to whisper?

Not currently but I will add that to my list. I'm making a handful of scripts to make working with whisper files easier (basic create/update/fetch operations, resize, etc). It should make it into the next release probably.

Hey Joel, Chris

I'm trying to make the RRD files from collectd work on graphite without success, it seems that the web front-end recognizes the rrd files as directories in the path instead of graphing it, the logs didn't help much, no errors .... :-(

Any ideas?

Are they empty directories? The reason Graphite shows RRD files as directories when you are browsing is because each RRD file contains one or more data sources, so the RRD file itself is represented as a folder and the datasources are represented as files. If it is empty when you try to open it, then it is having a problem reading the RRD files. Do you have the rrdtool python module installed?

Hi i have a problem with showing rrds too, trying to see rrds from ganglia, and i get this message:

RRDDataSource instance has no attribute 'real_metric'
Request Method: GET
Request URL: http://localhost:8000/render/?width=300&height=205&target=alias(ToraCluster.__SummaryInfo__.bytes_in.sum%2C'Bytes%20In')&target=alias(ToraCluster.__SummaryInfo__.bytes_out.sum%2C'Bytes%20Out')&vtitle=packets&title=ToraCluster&from=1292931725&yMin=0&bgcolor=FFFFFF&fgcolor=000000
Exception Type: AttributeError
Exception Value:
RRDDataSource instance has no attribute 'real_metric'
Exception Location: /opt/graphite/webapp/graphite/render/datalib.py in fetchData, line 205
Python Executable: /usr/bin/python
Python Version: 2.4.3

Thanks for the details Cristian, this was a simple bug and I just committed a fix to trunk. This will be in the upcoming release in the next few days.