Hi, I have one more question about rrd data. I have a 100 Mbit/s ethernet. One of the nodes of this network is running ntop. This node has 2 NICs: one for the remote control and one for the packet capture.
By using the rrd plugin I want to view how much traffic a node did from x to y, where x and y are two timestamps, and I guess that value to be reasonably correct. If I create the graph for a node N I get a strange situation. The node was sending at 17 Mbytes/s for 5 min (the interval is 5 min), but this is not true because that node N was doing almost nothing (I unplugged the eth cable). I can believe that the node was sending at 17 Mbytes/s for 10 seconds not for 300 seconds. So, the value stored by rrd plugin can't be an average. So, What do the values in rrd files represent? I did not find any docs on that. Thanks Stefano > -----Messaggio originale----- > Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Per > conto di Burton Strauss > Inviato: venerdì 7 ottobre 2005 14.58 > A: [email protected] > Oggetto: RE: [Ntop] rrd plugin and data > > > Read the docs on rrd. Everything is stored as a RATE (per > second). So if you are storing at a 5m resolutions, that is > a count of around 266. What that is depends on the specific > file. Usually for count-type files it is bytes. > > -----Burton > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Stefano Martini > Sent: Friday, October 07, 2005 4:04 AM > To: [email protected] > Subject: [Ntop] rrd plugin and data > > Hi All, > I'm using ntop 3.1.50 and activated the rrd plugin to have a > view of the traffic stored in rrd files. > > If I fetch data for a specific host IP address I get a > strange output saying something like this: > > Thu Oct 6 16:00:00 2005 1128607200 4.33813 > Thu Oct 6 16:05:00 2005 1128607500 0.888533 > > What are the numbers in the third column? Bytes? Bits? > Bytes/sec? Bits/sec? What does 0.888533 mean? Less the 1 > bytes of traffic! > > Thanks > Stefano > > _______________________________________________ > Ntop mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop > > _______________________________________________ > Ntop mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop > _______________________________________________ Ntop mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop
