Thanks Igor, How did you find out this method? It's quite amazing.
I will try it on other versions if I have time. And maybe somebody somewhere can try on other versions also, hopefully :) Regards, Stephen -----Original Message----- From: Igor Rosenberg [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 06, 2008 9:57 PM To: Hu, Wenzhong [CMB-IT] Cc: [email protected] Subject: RE: [Ganglia-general] Is there any APIs or DB data I can use to getmetrics? Hello, I've also come upon the same need, and have resolved (by lack of information) to polling directly the gmetad. My solution works for version 3.0.6, I've never tested any other. You can connect a socket to ports 8651 and 8652 of the machine running gmetad (I don't know what is the difference between both ports). You receive an XML file of the last status monitored. The schema of the result is provided within the answer. I've attached sample output to this mail (one Grid containing one cluster containing one machine). To test the gmetad output yourself, see it running telnet ip 8651 where ip is the IP of the machine running gmetad If you speak java, you may use ganglia in your programs modifying the following code snippet : /** * Get a reader on the Ganglia output, whihc you can then parse with your prefered XML parser * @see http://www.mail-archive.com/[EMAIL PROTECTED]/msg 03642.html **/ protected BufferedReader openGangliaSocket() throws UnknownHostException, IOException { String gangliaHost ="192.168.1.2"; int gangliaPort = 8651; String socketCall = ""; // another poll string can be something matching "/GRIDNAME/MACHINENAME/METRIC" System.out.println("Polling socket " + gangliaHost + ":" + gangliaPort + ", cmd = " + socketCall); Socket gangliaSocket = new Socket(gangliaHost, gangliaPort); PrintWriter gangliaWriter = new PrintWriter(gangliaSocket.getOutputStream(), true); gangliaWriter.println(socketCall); BufferedReader gangliaReader; gangliaReader = new BufferedReader( new InputStreamReader(gangliaSocket.getInputStream()) ); return gangliaReader; } Hope that helps somebody somewhere :) Igor -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hu, Wenzhong Sent: lunes, 05 de mayo de 2008 15:04 To: Carlo Marcelo Arenas Belon Cc: [email protected] Subject: Re: [Ganglia-general] Is there any APIs or DB data I can use to getmetrics? Hi Carlo, Your explanation is very clear. Now I know where I should start. Thanks very much indeed. Stephen -----Original Message----- From: Carlo Marcelo Arenas Belon [mailto:[EMAIL PROTECTED] Sent: Monday, May 05, 2008 7:30 PM To: Hu, Wenzhong [CMB-IT] Cc: Ron Wellnitz; [email protected] Subject: Re: [Ganglia-general] Is there any APIs or DB data I can use to get metrics? On Mon, May 05, 2008 at 06:11:51PM +0800, Hu, Wenzhong wrote: > > What I need is the rrdtool schema or something for Ganglia :) rrdtool is a time series database, so there is technically no such thing as a "schema" (like you would expect on a relational database), as each metric is stored in an independent file (of fixed size and continuously doing summarizations), and the cluster is represented by a directory tree on disk. the definition of which and how many "buckets" (known as RRAs) to have for each metric is done in the code for gmetad (check gmetad/conf.c) and can be overridden through its configuration (check gmetad/gmetad.conf). > Anyway, I've never used rrdtool before. So the link you sent is of great help also. `rrdtool dump` or `rrdtool xport` could be used as a starting point. Carlo ------------------------------------------------------------------------ - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. 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