It’s amusing (and or confusing…) when people jump through hoops to research how the system works rather than just looking at the code (or for this sort of thing asking!).
The current breakdown by stratum is below.
I haven’t looked recently, but as others have said a lower stratum number isn’t a meaningful indication the server will return better time. A “stratum 1” server takes more care and feeding than one that uses multiple other servers to set the time. For example during leap second events among the servers that get the leap second wrong, the stratum 2 (or above) systems have in the past recovered much faster than some of the stratum 1 servers that needed human intervention.
| stratum | percent |
|---|---|
| 1 | 12.5544 |
| 2 | 68.4078 |
| 3 | 17.2738 |
| 4 | 1.5808 |
| 5 | 0.0687 |
| 6 | 0.1145 |
select count(*) into @c from servers
where score_raw > 10 and deletion_on is null and stratum > 0;
select stratum, (100/@c)*count(*) as percent from servers
where score_raw > 10 and deletion_on is null and stratum > 0 group by 1;