[rrd-users] Automatic Timestamp in RRD graphs
linux at thehobsons.co.uk
Wed Nov 26 16:12:27 CET 2008
Martin Knoblauch wrote:
> is there an rrdtool option to add a time stamp to the RRD graphs?
>That would be good for docimantation purposes. One can of course add
>them manually, but I am lazy :-)
I would recommend that you calculate the end time explicitly, rather
than use 'now'. Eg :
End=$(( $Now - $Now % $Step ))
Then you can use $End in your script, probably by using date to
format it for you.
Why do this ?
Well for documentation reasons, it gives the end date of the actual
data that is graphed - eg :15:10 instead of 15:11:27.
And of course, it avoids problems where rrd tool decides that a lower
resolution RRA covers your requested timespan better than the hi res
RRA you expected it to use.
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