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...@overlandstorage.com a écrit :
> 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:/") when
> instantiating an RrdDb object to fetch the data using the rrdtool format.
> This worked fine when using the root file system on our management node,
> which runs SUSE 11 (x86_64 based). However, when trying to store the files
> in our cluster file system, I continuously got the "not an RRD file" error.
> I dumped out the header, and it was all zero's. The underlying file system
> is based on XFS, and I found that Tobi fixed an mmap issue
> (https://github.com/oetiker/rrdtool-1.x/issues/426). Our cluster file system
> does not support mmap functionality since it's essentially a distributed NAS
> cluster which supports NFS and CIFS/Samba access and mmap doesn't
> necessarily lend itself easily to support mmap. So for us, it worked best to
> compile rrdtool with the "--disable-mmap" option. I also noticed that there
> is a version of rrdtool in the works (2.3) which contains the jrrd package
> which allows me to read the rrdtool format directly. I download the rrd4j
> 2.3 code and compiled it so that I can get a two-dimensional double[][]
> array, where the first column contains the timestamps and the second column
> contains the metric values. In this case, I have one for the RX bytes for a
> specified node & network interface and another one for the TX bytes. The
> main reason I need the 2.3 version is that it contains a getTimestamps()
> method for the DataChunk class. So my question is, when will the 2.3 version
> be officially released. I haven't seen any postings on its state for awhile
> now.
>
>
>
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