[rrd-users] strange rrd entries

[Wendy C. Etkind]

I just started using rrd, I am considering switching from mrtg.
I created an rrd database and fill the database with ifInOctets and
ifOutOctets, here is a sample of the strings I send to rrdtool update:

969048833:29668470632:33156258072
969048893:29741487872:33328485744
969048953:29817871792:33485420264
969049013:29934626024:33660785456
969049073:30028894200:33875303008
969049133:30125822936:34199518912
969049193:30231816104:192880048
969049253:30311924888:500266728
969049373:30472247552:1040373776
969049433:30664512008:1209311704
969049493:30791578728:1396358816
969049553:30924155064:1599270928
969049613:31071501736:1830407352
969049673:31182252736:2069322192
969049733:31269971080:2230359464
969049793:31318982752:2401083696
str: 969049853:31365970368:2629705352

When I do an rrdtool fetch I get the following:

969048840 2055701.155738 2196238.799016
969048900 1223500.322222 2840724.515556
969048960 1351563.162222 2651412.751111
969049020 1902180.980000 2998882.788889
969049080 1576309.577778 3788594.884444
969049140 1633104.217778 35868668970862180.000000
969049200 1716222.053333 271577065029557248.000000
969049260 1335635.388333 4775705.576111
969049320 1335635.388333 4775705.576111
969049380 1554000.496667 4304278.407778
969049440 3077634.224444 2850844.435556
969049500 2128491.808889 3148300.477778
969049560 2238325.697778 3436749.140000
969049620 2384619.615556 3867398.431111

notice the huge numbers at times 969049140 and
969049200, what causes these? How can I filter these
or avoid these? There is nothing in my input data
that should cause such spikes. Do I need to run the killspikes
routine?
-- 
Wendy Etkind (wendy at mitre.org)
Lead Technical Staff: The MITRE Corporation
(781) 271-3217, DSN 478-1186 x3217, fax (781) 271-8689

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