4 Apr
2014
4 Apr
'14
6:48 a.m.
On (2014-04-04 20:37 +1100), Julien Goodwin wrote:
Meinberg[0] pegs rubidium at ±8ms per year, if you need NTP to do say single direction backbone SLA measurement you want to have microsecond precision.
Those two statements don't go together.
Point I was making is that free-running rubidium is not accurate enough for QoS measurements of IP core.
Also outside the HFTers most of us don't care about a few milliseconds (sure an extra 50ms can be a pain, but is trivial to measure).
Jitter in backbone is low tens of microseconds, if you want to measure how that changes over time, free-running rubidium is not going to cut it. -- ++ytti