[rrd-users] Re: Correcting for GMT lag on daily values

[Joe Loiacono]

Yes, doing as you describe does keep the input values intact. Thanks.

However, the times associated with the values in the database are set to
the local time, and hence when a graph is generated the data is offset from
the vertical lines which occur on the GMT midnight boundaries. Here in
Maryland its 4 hours different (5 after Nov. 1), producing an unclean and
confusing graph.

I'm in the process of trying the 3600 step approach (first attempt
failed...)

Joe



                                                                                                                   
                    "Claude R                                                                                      
                    Trepanier/Bro        To:     "rrd-users" <rrd-users at list.ee.ethz.ch>                           
                    mont"                cc:                                                                       
                    <crtrepan            Subject:     [rrd-users] Re: Correcting for GMT lag on daily values       
                    @ca.ibm.com>                                                                                   
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                    rrd-users-bou                                                                                  
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                    09/06/2002                                                                                     
                    05:46 AM                                                                                       
                                                                                                                   
                                                                                                                   





>Thanks very much. Unfortunately it is somewhat more complicated. See Serge
>and Alex's discussion:

Actually it's not...I went through this myself a few weeks ago.

If your RRD start time is midnight GMT and you feed rrdtool with a
timestamp of midnight GMT every day you will get the actual values in the
database.

This is usually considered the wrong way to use the tool but when it's what
you need it does work.

Claude R Trépanier
Support de l'infrastructure du réseau
IBM Bromont


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