>>> On 7/29/2009 at 11:23 PM, in message <669f1ab30907292223t2734f551lc8d9b98201d7f...@mail.gmail.com>, Mahendra Kutare <mahendra.kut...@gmail.com> wrote: > Hi All, > > If I have configured gmond.conf with a udp_recv_channel with just a port > number will that configure ganglia gmond to listen on that particular port > any incoming data and thus making it essentially unicast communication > channel ? >
Yes, specifying just a port will configure gmond's recv channel in unicast mode > What happens if the sending side sends data every 1 sec will that be > transferred immediately to gmond or it waits to collects some packets of > data and then delivers to gmond listening side ? > > I started sending some data from outside of gmond interface to gmond which > is configured as mentioned above to a udp_recv_channel on port 8108. > > Now even though the sending side is pushing data in every 1sec. I do not see > gmond showing in debug mode on the console that its processing Ganglia > message from sender side every 1 sec. > > Is it just the display part of the problem or ganglia does some > sophisticated processing of incoming data i.e waiting for a message size > before delivering it ? > How did you configure gmond to send data every 1 sec.? Gmond sends its data in collection groups and each collection group is configured with a send time threshold. At the very worst, the collection group will send all of the metric values within that group once the group's collection threshold has been exceeded. In addition, each metric is assigned a value threshold which is a percent of change differential. If any of the metrics within the collection group, differential change exceeds the value threshold, the entire group of metrics is immediately sent. So even though a collection group is set to collect every 1 second, that doesn't mean that the metrics are sent every 1 second. Also, by default the rrd files are configured by gmetad to store metrics at an interval of every 15 seconds. So even if the metrics were sent every 1 second, you will still only be seeing 15 second averages in the front end. Brad ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Ganglia-developers mailing list Ganglia-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-developers
