Vladimir, I'm pretty sure - I see this in the logs for example (this is from one machine):
Dec 18 13:01:52 ntpd[4467]: time reset +0.728211 s and then the network graph shows petabytes transmitted in that minute. On Dec 21, 2012, at 1:46 PM, Vladimir Vuksan wrote: > Are you absolutely sure these are NTP related ? > > Vladimir > > On Fri, 21 Dec 2012, Michael Durket wrote: > >> I'm experimenting with Ganglia to see if it's a viable replacement for >> Zabbix at our site. One of the more troublesome issues I've found is with >> the network graphs. Occasionally, one of our many hosts will get an NTP time >> adjustment (usually fractions of a second). When that happens, all of a >> sudden it looks like our network transferred hundreds of petabytes of data >> (according to the Network Report graphs). >> >> I suspect this is somehow related to RRD but I was wondering if anyone had >> seen this or knows of a workaround. People here expect the graphs to reflect >> data accurately (something that Zabbix isn't very good at when it's under >> load) and this kind of behavior is problematic (and could disqualify Ganglia >> from consideration). >> >> If this is in fact an RRD issue does anyone know if this kind of thing >> happens with Graphite and Ganglia? >> >> >> >> >> ------------------------------------------------------------------------------ >> LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial >> Remotely access PCs and mobile devices and provide instant support >> Improve your efficiency, and focus on delivering more value-add services >> Discover what IT Professionals Know. Rescue delivers >> http://p.sf.net/sfu/logmein_12329d2d >> _______________________________________________ >> Ganglia-general mailing list >> Ganglia-general@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/ganglia-general >> > ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ Ganglia-general mailing list Ganglia-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-general
