ntp.ttwagner.com
This is the status page of the ntp.ttwagner.com (66.197.144.101) NTP server. (That host is actually a different IP, and this webpage is served from a virtual machine; I'll elaborate in a subpage some day.)
Current Time Sources:
Client Graphs
These are based on the data here.
Total Clients
Active Clients
Average Requests per Second (Current rate)
Abusive Clients
Quality Graphs
These are generated every 5 minutes using RRDTool and the scripts here. Note that NTP doesn't necessarily update every 5 minutes (it's usually every 1024 seconds, or ~17 minutes.), so these graphs might look 'blocky' as a result.
Offset: The most recent change to the clock:
Jitter: The 'difference of the differences' in readings (a shoddy explanation for now)
Root Dispersion: The maximum error range, summed across all hosts in the chain
This is an interesting effect... It seems that NTP increases this in a linear (or almost-linear) fashion, until the next sync, at which point it's recalculated, causing it to drop back down quickly... Hence the curious sawtooth pattern.
Noise: Yeah.
Frequency: The error of the system (hardware) clock, in parts-per-million. (This is what's stored in the NTP drift file.)
Stability: In parts-per-million
Delay: Latency to the current server; wild variations probably indicate switching to a different clock...
