> -----Original Message----- > From: Carlo Marcelo Arenas Belon [mailto:[EMAIL PROTECTED] > Sent: September 9, 2008 4:33 PM > To: Witham, Timothy D > Cc: Escobio, Roger [CMB-IT]; > [email protected]; [EMAIL PROTECTED] > Subject: Re: [Ganglia-general] Anyone experience petabyte > peaks in network metric in ganglia 3.x.y ? > > On Tue, Sep 09, 2008 at 01:42:34PM -0600, Witham, Timothy D wrote: > > >I am testing ganglia in a cluster of linux but we are getting this > > >confusing peaks in the bytes/s and in the packets/s (image > attached) > > is it Red Hat Linux and a broadcom adapter?, x86 running in > 64 bit mode? > > > I have been able to minimize this significantly by using > code from svn > > trunk and building with > > > > make CPPFLAGS=-DREMOVE_BOGUS_SPIKES > > the code for doing that is also part of 3.1 as well, so there > is really no > need to patch your local ganglia with code from svn just for > that, but as you > said you will need to build it with the right flags. > > > IMHO, that should be the default. > > AFAIK the reason why it is not the default is because it is > only presented > in some version of linux and a specific adapter, which are > both very popular > but not the general setup, but will let Martin elaborate on > that, specially > since from what I remember the driver problem has been fixed > already in the > kernel.
That could be the reason.... I am using rhel4u5 (I am using an old kernel, I know, that is why I accept that that could be the problem) But I would like to get more info about it :-) > > there is also the problem that it could throw away valid data which is > naturally spiky. Yes, that is true But I like the way the collection of data is done in the unix side (*bsd), it looks more revised, than the way it is done in linux althought at the end both use the formula ULONG_MAX - old + new, it is just that counterdiff() make some checks before do it Thanks roger ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
