Hello, I am a last year student of IT, and for my final project I was looking to find a way to provide information about a GRID using java web services. I found Ganglia monitoring system and decided to use it as a source of information for my web service. To do that I need to dig out information collected by ganglia from rrd database. I have a few ways to get information for my java web service:
- from rrd database using java ( jRobin, jRRD, rrdjtool, rrdtool-1.0.33-java, running rrdtool) http://monstera.man.poznan.pl/wiki/index.php/RRD_Java_libraries - from rrd using other tool and provide them raw as a web service ( perl, python ) http://oss.oetiker.ch/rrdtool/prog/index.en.html I already have a path that makes ganglia not only store information to rrd database, but also redirect them to stdout. The information are then taken from std out, using a pipe, and stored in jRobin database. This provides easy access to rrd (jRobin) database from java. The problem here is that the pipe consumes a lot of CPU. Another solution is to rewrite the whole gmetad to java and only use jRobin, but this would be a huge change and interference to the source code. I can also try other java tools to get information from rrd database. But here I face some problems also. jRRD is very simple and has not been developed for past 6 years. Running rrdtool from java using System.exec() is slow and you need to parse results. Maybe I should try rrdjtool... So you think it's a good idea? On the other hand, I can make information from rrdtool accessible via web service written in perl. This solution has an advantage, because I can provide information to my java web service about more than one GRID. I want to ask You guys what do you suggest? Which method should I choose? ( rewrite gmetad, rrdjtool, perl ). Thank u very much for such a quick response, regards, Mateusz ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
