Hi all, In our production system we have Ganglia 3.0.2 running on Server A (/var/lib/ganglia/rrds/abc) for about a year to monitor 64 3.0.2 gmond clients so we've accumulated lots of historical data. Our plan is to migrate the setup to the latest Ganglia 3.1.7. I recently installed Ganglia 3.1.7 gmetad on Server B with rrdtool 1.4.4, selected one of the 3.0.2 client (let's call it client 64), uninstalled 3.0.2 gmond and installed 3.1.7 gmond. In addition to the 64 3.0.2 clients to be migrated, I have 16 new 3.1.7 clients to start off with Server B. The cluster name of the 16 new clients is "xyz". Starting up Server B gmetad and the 16 clients created /var/lib/ganglia/rrds/xyz. No problem with the webfrontend on Server B showing everything for the 16 clients, including the graphs. I then stopped Server B gmetad. At this point I have not started client 64 gmond yet. I then proceed to copy Server A's /var/lib/ganglia/rrds/abc onto Server B's /var/lib/ganglia/rrds directory. Start up Server B gmetad, start up Client 64 gmond. Server B Webfrontend will not display any graphs for cluster "abc" at all. Cluster "xyz" are fine.
I then proceed to try the "offline rrds" method by shutting down Server B gmetad and Client 64 gmond. Moved /var/lib/ganglia/rrds/abc to /var/lib/ganglia/rrds.offline/abc. Reproduce the webfrontend - copy /var/www/html/ganglia to /var/www/html/ganglia.offline. Modified /var/www/html/ganglia.offline/conf.php to point to /var/lib/ganglia/rrds.offline. Start up Server B gmetad and Client 64 gmond. http://Server-B/ganglia.offline showed both cluster "abc" and "xyz" with no graphs. Back to http://Server-B/ganglia will show cluster "xyz" with no problem. My suspicion is the incompatibility of rrds between the 3.0.2 and 3.1.7 versions which make 3.1.7 refuse to show the graphs? Something to do with some "timing parameters" mismatch inside the rrds between the old and the new for the webfrontend to show? Any thoughts or suggestions are welcome before I stop spending more time in this. Thanks. Steve AT&T Labs CSO ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
