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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I see in the rrdfetch man page there is a DST warning saying “If you specify time offset in days, weeks, months, or years, you will end with the time offset that may vary depending on your time reference,… 1 day may be not equal to 24 hours twice a year, when DST-related clock adjustments take place….” <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I used seconds for all the offsets when the DS was created.<o:p></o:p></p><p class=MsoNormal> dataToKeep=`expr $rraDaysToKeep \* 86400 / $step`<o:p></o:p></p><p class=MsoNormal> rraString="$rraString RRA:AVERAGE:0.5:1:$dataToKeep"<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> if [ $step -lt 1800 ]; then<o:p></o:p></p><p class=MsoNormal> valuesPerHalfHour=`expr 1800 / $step`<o:p></o:p></p><p class=MsoNormal> halfHourValuesToKeep=`expr $rraDaysToKeep \* 48`<o:p></o:p></p><p class=MsoNormal> rraString="$rraString RRA:AVERAGE:0.5:${valuesPerHalfHour}:${halfHourValuesToKeep} RRA:MAX:0.5:${valuesPerHalfHour}:${halfHourValuesToKeep}"<o:p></o:p></p><p class=MsoNormal> fi<o:p></o:p></p><p class=MsoNormal> if [ $step -lt 3600 ]; then<o:p></o:p></p><p class=MsoNormal> valuesPerHour=`expr 3600 / $step`<o:p></o:p></p><p class=MsoNormal> hourValuesToKeep=`expr $rraDaysToKeep \* 24`<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When I said that everything was in epoch, I was implying that none of my scripts use localtime or a named time offsets. All my data is inserted using an epoch time and my rrdfetch uses “–s <epoch>-300”.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So is it the case that if my system is running with a TZ offset that twice a year RRD is going to return an error? <o:p></o:p></p></div>
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