Sorry for the delayed reply. On Sep 9, 2019, at 12:21 AM, Yoshitaka Aharen <aharen@jprs.co.jp> wrote:
I would like to clarify how to read the data.
20190902:221500 (1567487700): [snip] m 2019090201: 30 2019090300: 02
Does it mean there are 32 vantage points in total, and at unix time 1567487700, 30 of them got SOA serial 2019090201 and the rest two of them got 2019090300, ...
Close, but not exact. There are eight vantage points (VPs), and each VP does four tests for availability / response latency (v4udp, v4tcp, v6udp, v6tcp). That's what goes into the 32 total. But you are correct that of those, 30 got the lower serial number and two got the higher.
20190902:222002 (1567488002): [snip] m 2019090201: 00 2019090300: 32
... then queried again at unix time 1567488002 which is 302 seconds later from the previous, all of 32 vantage points got SOA serial 2019090300?
Yes.
If I interpret it correctly, focusing on M-Root, it means all server instances receive updated root zone data within 5 minutes.
Yes. --Paul Hoffman