Hi Dave: On Thu, Mar 11, 2010 at 6:52 AM, Cademair <[email protected]> wrote:
> I'm going to be changing the RRA's in my cluster to retain more granular > data for a longer period of time. From what I understand, I need to erase > the current RRD's and let gmetad create new ones. I'd still like for users > to be able to view the archived metrics for a period of time, however. Can > I copy off the current RRD's to a different directory, or even a different > web server and let Ganglia run in an offline mode? This would strictly be > for looking at the old data, not gathering the new metrics. I've read that What you could do is copy the old data to another directory on the server, for instance /var/lib/ganglia/rrds -> /var/lib/ganglia/rrds.offline. Also, make a copy of the docroot /var/www/html/ganglia -> /var/www/html/ganglia.offline. Go into the copied docroot and modify conf.php replacing $rrds to "$gmetad_root/rrds.offline". Then when you go to http://<server>/ganglia.offline, you will only be shown the historic data. However, there are a few gotchas with this approach: 1) The "offline" webfrontend instance will still be polling the live gmetad and constructing live information regarding your cluster (eg. current load) 2) Since the rrd files are no longer being updated, you may have a hard time viewing the data via the graphs with the pre-set time scale (last hour, day, week, etc.) so you might need to modify the code or use the calendar plugin Cheers, Bernard ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
