[rrd-users] Can I make rrd graph with offline data set.

[Alex van den Bogaerdt]

On Tue, Aug 28, 2007 at 10:28:02PM -0400, Dan Cech wrote:
> nina wrote:
> > Hi.
> > I have system usage data set for 4 weeks.
> > I didn't make rrd db and update before gethering data.
> > 
> > Can I make rrd graph with offline data set in this case?
> 
> Yes, you will need to specify the start time when you create the RRD and
>  then write a script to feed the data in.  Use the actual timestamp of
> the data instead of N for the updates.

Indeed, good advice.
 
To elaborate a bit:
- the start time needs to be slightly earlier than the first timestamp.
- it usually helps if you convert timestamps to "seconds since epoch",
  "date +%s". Right now would be 1188373486.

HTH
-- 
Alex van den Bogaerdt
http://www.vandenbogaerdt.nl/rrdtool/