On Fri, 2007-02-09 at 08:59 -0500, Weikuan Yu wrote: Hi.
I'd like to briefly explore this second problem... > 2) Inaccurate reports due to any drift in time > -- Time drift is an annoying problem of IOR. What do you mean exactly by time drift? "Drift" to me means that the difference in the clocks of machines actually grows, not that they are simply just not synchronized yet constant. If you have drift in terms of clocks actually growing apart, do you know why this is? Are you using ntp to (try) to keep the clocks in sync? What if you synchronize the clocks (i.e. with ntpdate or rdate, etc.) of all of the nodes right before the IOR run? Are they still all in sync after the run ends? > IOR checks on the skew > of timestamps from each process. But it does not calibrate the timer at > the beginning. So it spews numerous warning on systems with big drift > across nodes. What warnings were you seeing? What version of Lustre are you using? b. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
