> -----Original Message----- > From: Richard Mohr [mailto:[EMAIL PROTECTED] > Sent: Thursday, May 17, 2007 1:43 PM > To: Matthew Chambers > Cc: ganglia-developers@lists.sourceforge.net > Subject: RE: [Ganglia-developers] About gmetad data source intervals > > On Thu, 2007-05-17 at 09:45 -0500, Matthew Chambers wrote: > > > Resizing of existing RRAs could be an optional add-on to be developed at > a > > later date, if at all (it seems safe to assume that if you change the > > interval of a data source with existing RRAs, then you also want the > > resolution of those RRAs to change, but NOT if it means losing data). > > My inclination is to leave the decision of resizing existing RRAs to the > admin. There are tools available to easily handle that, if that is > indeed what the admin wants. But some people may want to change the > step size while leaving existing RRAs untouched. I think its safer if > gmetad doesn't force a particular choice on a user if it doesn't need > to.
Fair enough. However, it needs to be made clear in the documentation that after RRDs have been created for a data source, changing the interval will not change the RRDs. > But if you have a patch to implement the "dynamic default" scheme you > mentioned, I would love to see that included in Ganglia. > I will look into it. It seems at a glance that every data source uses the same default RRAs which is obviously not workable if different data sources have different intervals which would seem like a very common use case. Would moving the RRA sizes into data_source_list_t be likely to cause lots of conflicts all over the place? -Matt ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Ganglia-developers mailing list Ganglia-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-developers
