[rrd-users] Urgent!!!!!!!Can any one help me?

[Qingbo Jin]

Hi all:
     I happened a very urgent problem. Is there
a way I can change the data value on rrd database??
I tried to change the old data I failed . see following:

rrdtool update tcp.rrd
994690200:9.11111111e+06:0.002222222e+00:1.3333333e+04:0.0444444444e+00:3.55
5555555e+02:0.00666666666e+00
ERROR: illegal attempt to update using time 994690200 when last update time
is 994690256 (minimum one second step)


Does that mean the rrdtool cannot change old data???

I really want your help about this.

thanks

Jin


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