Serge Maandag wrote: > If he sets his step to 86400 and his ds heartbeat to: > 86400 + (a small interval in case he runs late with his daily update) > And he does his first update at midnight, wouldn't that just be what he > wants? > His pdp's would be at 00:00 exactly.
No, unless you work in UTC time. All times inside RRDtool are a whole multiple of the step size. If the step size is 86400, today would be 1019174400. This is 1019250638 - (1019250638 % 86400). Perl shows the time: perl -e 'use POSIX;print ctime(1019174400)' which results in 'Fri Apr 19 02:00:00 2002' (local time). > I can see why your method works, but wonder what the advantage is. If the step size is 3600, the current time minus the modulo would be perl -e 'use POSIX;print ctime(1019250638 - (1019250638 % 3600));' Fri Apr 19 23:00:00 2002 So, if I would update now, in the first example I would update at 02:00 local time, in the second example I would update at 23:00 local time. Similarly, if I would update just after midnight I would still update at 02:00 (the day before!) in the first example while I would update at 00:00 (*that* day) in the second example. > b.t.w., on the rrdtool site under the heartbeat and the step it says: > > ``heartbeat'' is not only the maximum acceptable interval between > samples, but also the maximum acceptable amount of ``unknown'' time per > PDP (obviously this is only significant if you have ``heartbeat'' less > than ``step''). > > Is this right? I believe that the x-files factor for the ds is the > parameter that determines this. xff is for the amount of PDPs per CDP. cheers, -- __________________________________________________________________ / [EMAIL PROTECTED] [EMAIL PROTECTED] \ | work private | | My employer is capable of speaking therefore I speak only for myself | +----------------------------------------------------------------------+ | Technical questions sent directly to me will be nuked. Use the list. | +----------------------------------------------------------------------+ | http://faq.mrtg.org/ | | http://rrdtool.eu.org --> tutorial | +----------------------------------------------------------------------+ -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
