Hi Wilfried,

We cannot display synchronized graphs at the last measurement time position because RRDs are updated only when the measurement data comes from the probe. Probes are allowed to send data not synchronous for all the measurements.

As it implemented currently, we stop the graph at the time stamp of the last measurement. We can do it using current time, in this case graphs will be aligned, but unreceived data will be displayed as a gray area, that's what we do not really want.

>From your email I can guess that you are fetching graphs for your own page.
In this case you can set the end time which ever you want:

http://atlas.ripe.net/atlas/rrd.png?prb_id=3&msm_id=1001&type=minutely&end=now

or even allow it to be, for example, 15 minutes older:

http://atlas.ripe.net/atlas/rrd.png?prb_id=3&msm_id=1001&type=minutely&end=now-15min

now is UTC

Best regards,

/vty

I just noticed that the various graphs for the "last 2 hours" display
seem to be based on different clocks or update cycles (delta = some 25m).

Should these graphs be "synchronised"?

>From a UI-perspective it would certainly be a bonus to have them aligned,
at least for one probe.

All the best,
Wilfried.