[rrd-users] Re: rrdtool update usage

Peter Chen petechen at on2.com
Wed Mar 22 19:38:10 MET 2000

Tobias Oetiker writes:
>Yesterday you sent me mail regarding [rrd-users]  rrdtool update usage:
>*> Hi,
>*> I have an RRD with 2 columns.  How do I update the first column first,
>*> then the second column?  Following the documentation, I tried,
>*> rrdtool update foo.rrd -t col1 953542800:1
>*> ... bunch of commands updating col1 ...
>*> rrdtool update foo.rrd -t col2 953542800:3
>*> ... bunch of commands updating col2 ...
>*> For some reason the updates for col2 don't seem to take, am I missing
>*> something here?  
>you can only update all the columns at once ... if you drop some
>they will go into the update as *UNKNOWN*


Ahh... that explains my problem.  Is there any way to accomplish what
I am looking for?  I am trying to graph the aggregate data from a web
server farm.  The data from the individual servers don't come in at
the same time.  It would be ideal to update the data as they come in.


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