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by dementis
1314 days ago
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Here is a bit of a comparison with these three NTP servers in a /etc/chrony.conf pool time.aws.com iburst
pool 1.amazon.pool.ntp.org iburst
pool time.nist.gov iburst
# chronyc sourcestats
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
ec2-54-86-189-11.compute> 4 3 7 -1128.596 60538.254 -17ms 9310us
ec2-18-212-174-188.compu> 4 3 7 -3475.306 40696.289 -32ms 7334us
ec2-54-224-100-122.compu> 4 3 7 -2748.130 71563.352 -26ms 11ms
ec2-3-80-167-198.compute> 4 3 7 +827.953 78440.828 +1398us 12ms
38.229.57.9 4 4 7 +744.719 67529.711 +117us 9384us
time.cloudflare.com 4 3 7 +957.450 44361.117 +3899us 6424us
3dhomejoe.com 4 3 9 -958.576 43000.809 -14ms 7052us
shed.galexander.org 4 4 7 -4034.244 62138.637 -36ms 10ms
time-a-b.nist.gov 4 4 7 +1475.911 50544.457 +9056us 5773us
# chronyc sources
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^- ec2-54-86-189-11.compute> 4 6 17 19 -5776us[-5776us] +/- 76ms
^- ec2-18-212-174-188.compu> 4 6 17 20 -22ms[ -22ms] +/- 57ms
^- ec2-54-224-100-122.compu> 4 6 17 21 -1057us[-1057us] +/- 77ms
^- ec2-3-80-167-198.compute> 4 6 17 21 +2093us[+2093us] +/- 57ms
^- 38.229.57.9 2 6 17 21 -769us[ -769us] +/- 185ms
^\* time.cloudflare.com 3 6 17 22 -2043us[+3354us] +/- 34ms
^+ 3dhomejoe.com 2 6 33 19 -23ms[ -23ms] +/- 102ms
^- shed.galexander.org 3 6 17 20 -32ms[ -32ms] +/- 114ms
^- time-a-b.nist.gov 1 6 17 21 +10ms[ +10ms] +/- 55ms
And for comparison pool pool.ntp.org iburst
pool time.nist.gov iburst
# chronyc sourcestats
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
time.cloudflare.com 4 3 6 +1363.306 27212.342 +8424us 3911us
time100.stupi.se 4 4 8 -1051.634 11864.409 -12ms 2419us
ntp2.flashdance.cx 4 3 7 +183.591 78497.898 -1031us 9048us
time.cloudflare.com 4 4 7 +566.874 56659.176 +1998us 8584us
time-e-b.nist.gov 4 3 6 -5.327 7264.481 +710us 988us
# chronyc sources
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^+ time.cloudflare.com 3 6 17 11 -1590us[-2743us] +/- 66ms
^- time100.stupi.se 1 6 17 10 -5597us[-5597us] +/- 116ms
^\* ntp2.flashdance.cx 2 6 17 10 -31ms[ -32ms] +/- 168ms
^- time.cloudflare.com 3 6 17 10 -17ms[ -17ms] +/- 98ms
^+ time-e-b.nist.gov 1 6 17 11 +504us[ -649us] +/- 56ms
I'll stick with a config that queries Stratum 1 time server vs only Stratum 4 servers.\\EDIT: Formatting |
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