Dave, I thought that the web UI was driven this way. Or is it gmond providing the XML output for the web UI (rather than gmetad)?
Thanks, Bryan > -----Original Message----- > From: Dave Rawks [mailto:d...@pandora.com] > Sent: Thursday, January 26, 2012 4:06 PM > To: Bryan Thompson > Cc: ganglia-developers@lists.sourceforge.net > Subject: Re: [Ganglia-developers] Protocol Efficiency Ideas > > On 01/26/2012 12:07 PM, Bryan Thompson wrote: > > Dave, > > > > There is undoubtably fat in the XML. However, I think that > you would get far more savings by giving the client a means > to request which data they are interested in. Right now it > sends everything each time, right? It would be nice if you > could provide a regex for what you needed. One option would > be to put up an http end point which allowed query parameters > that describe the data of interest. I've done this in a > similar system in Java. Not sure what options are out there > in C for embedded httpd. > > > > Bryan > > > > Such a thing already exists for requesting data from gmetad, > the ganglia-monitor xml exchange however doesn't have any > notion of limiting scope. Typically there is only one > consumer of data from ganglia-monitor via xml, which is > gmetad AND gmetad wants all the data every time, so I don't > know that any sort of scope limit on request would be that > great of a gain really. > > The json bit OTOH doesn't currently exist AND as such doesn't > have any known consumers or consumption patterns. Adding some > provider side filtering may be desirable, but I would > speculate that most of the time the ganglia-monitor access > pattern will be "tell me everything" and the per > grid/cluster/host/group/metric filtering would happen up at > the gmetad or gmetad-equivalent layer. I.E. maybe you replace > gmetad with a message queue, the filtering would be provided > by the topic subscription mechanism of your message queue system. > > -Dave > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Ganglia-developers mailing list Ganglia-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-developers
