Re: [opennms-devel] jrobin and rrd4j

2014-05-16 Thread cwill...@overlandstorage.com
I was using rrd4j 2.2 with ganglia to provide performance metrics to our web-based UI which includes it's own graphing package. As you probably know, ganglia's gmetad gathers stats from all nodes in a cluster and stores them in rrdtool binary format. I was using the PREFIX_RRDTool ("rrdtool:/") whe

Re: [opennms-devel] jrobin and rrd4j

2014-05-16 Thread Fabrice Bacchella
I'm one of the maintener of rrd4j. The release of rrd4j are discussed at https://groups.google.com/forum/#!forum/rrd4j-discuss. I know I' late but I made a lot of change in 2.3, and I lack time to test them as deeply as I wanted to. Any help is welcome. Le 16 mai 2014 à 18:12, cwill...@overl

Re: [opennms-devel] jrobin and rrd4j

2014-05-16 Thread cwill...@overlandstorage.com
BTW, using the RrdDb object to fetch the data using the FetchRequest & FetchData classes took around 40 seconds to read an hours worth of data on the XFS clustered file system. Using the RRDatabase class, which reads the raw rrdtool data format, and the DataChunk class took less than a second. That