[atlas] Actual measurement interval much larger than planned

On 2016-09-02 12:20, Wenqin SHAO wrote:
> Thanks for confirming. The specified frequency is indeed well respected. When there is no data-missing, the interval shift rarely exceed 14s, small compared to 240s the scheduled interval.
> What intrigues me is that the exact phase/timing is as well kept after power cut and reboot.

The probes have a crontab-like mechanism to remember what they need to do.
As long as their clock is more or less ok, they will stick to the
pre-allocated times and tasks.

> By the way, can a measurement be as well skipped, as designed behaviour, due to scheduling issues mentioned by @Cristel?

We're trying to avoid overloading probes, but not everything is under our
full control. Some measurements can pile up; Cristel & Randy & co. had a
paper about the observed (worst-case) behaviour.

Regards,
Robert