[latchkey]

Given that jmxtrans has native support for writing directly to Graphite, why are you using it to write to rrd files?

If you want those rrd files for other tools, the beauty of jmxtrans is that you can have multiple outputwriters so you can write to rrd AND graphite at the same time, with no loss in performance, since it happens in a multithreaded environment.

Also note, writing to rrd files from jmxtrans is terribly inefficient. It spawns the rrdtool to do it because (unfortunately) the java implementation of rrd outputs files which are not compatible with rrdtool.

(I'm the author of jmxtrans. Thanks for using my stuff!)