NTP中的高抖动和轮询值从不超过128。
NTP中的高抖动和轮询值从不超过128。
提问于 2014-05-28 10:00:23
我有很多服务器同步到相同的NTP服务器(4)。并不是每台服务器都在同一个局域网中。有些离NTP服务器3跳，有些离NTP服务器6跳。
在两个服务器上，我看到轮询值从未触及1024标记，抖动值为两位数。可能是系统硬件造成的吗？这些是windows服务器(物理的)，需要尽可能准确的时间。请告诉我该怎么做。
我从坏框(离ntp服务器6跳)手动收集到的一些统计数据。
C:\Program Files (x86)\NTP>ntpq -p -n
remote refid st t when poll reach delay offset jitter
==============================================================================
+*.*.*.25 *.*.*.233 2 u 12 128 377 1.210 -12.579 14.913
+*.*.*.26 *.*.*.233 2 u 96 128 377 1.067 -2.235 9.885
**.*.*.27 *.*.*.233 2 u 24 128 377 1.038 -7.569 11.178
+*.*.*.28 *.*.*.233 2 u 49 128 377 1.288 -11.058 14.544
remote refid st t when poll reach delay offset jitter
==============================================================================
+*.*.*.25 *.*.*.233 2 u 124 128 377 0.614 -6.212 5.329
+*.*.*.26 *.*.*.233 2 u 93 128 377 0.910 -9.431 3.111
+*.*.*.27 *.*.*.233 2 u 1 128 377 0.824 -7.428 3.129
**.*.*.28 *.*.*.233 2 u 84 128 377 1.503 -8.230 3.511
remote refid st t when poll reach delay offset jitter
==============================================================================
**.*.*.25 *.*.*.233 2 u 117 128 377 1.235 -4.084 11.405
+*.*.*.26 *.*.*.233 2 u 96 128 377 1.335 -11.813 13.130
+*.*.*.27 *.*.*.233 2 u 130 128 377 1.549 -14.036 16.381
-*.*.*.28 *.*.*.233 2 u 79 128 377 1.258 13.395 22.203
remote refid st t when poll reach delay offset jitter
==============================================================================
**.*.*.25 *.*.*.233 2 u 88 128 377 1.235 -4.084 14.068
+*.*.*.26 *.*.*.233 2 u 63 128 377 1.335 -11.813 17.086
+*.*.*.27 *.*.*.233 2 u 103 128 377 1.549 -14.036 20.691
-*.*.*.28 *.*.*.233 2 u 47 128 377 1.258 13.395 20.231
remote refid st t when poll reach delay offset jitter
==============================================================================
+*.*.*.25 *.*.*.233 2 u 47 64 377 0.652 -15.805 14.077
**.*.*.26 *.*.*.233 2 u 11 64 377 1.013 -14.423 11.375
-*.*.*.27 *.*.*.233 2 u 63 64 377 0.765 -2.030 7.680
+*.*.*.28 *.*.*.233 2 u 4 64 377 1.191 -17.980 14.393
remote refid st t when poll reach delay offset jitter
==============================================================================
-*.*.*.25 *.*.*.233 2 u 3 128 377 1.576 18.665 21.999
+*.*.*.26 *.*.*.233 2 u 73 128 377 0.637 -5.012 14.405
**.*.*.27 *.*.*.233 2 u 127 128 377 0.272 -8.237 14.438
+*.*.*.28 *.*.*.233 2 u 123 128 377 1.190 -14.383 18.875
C:\Program Files (x86)\NTP>ntpdc -c loopinfo
offset: -0.016430 s
frequency: 7.106 ppm
poll adjust: 18
watchdog timer: 133 s
offset: -0.016430 s
frequency: 7.106 ppm
poll adjust: 18
watchdog timer: 341 s
offset: -0.000149 s
frequency: 6.645 ppm
poll adjust: 0
watchdog timer: 383 s
offset: 0.015735 s
frequency: 6.725 ppm
poll adjust: 7
watchdog timer: 577 s
offset: -0.010331 s
frequency: 6.748 ppm
poll adjust: 21
watchdog timer: 567 s
offset: -0.009427 s
frequency: 6.687 ppm
poll adjust: 28
watchdog timer: 301 s
offset: -0.007361 s
frequency: 6.612 ppm
poll adjust: 30
watchdog timer: 155 s
offset: -0.008106 s
frequency: 4.358 ppm
poll adjust: 30
watchdog timer: 291 sNTP.conf
# NTP configuration file
# Use drift file
driftfile "C:\Program Files (x86)\NTP\ntp.drift"
# Logs
statistics loopstats peerstats clockstats
statsdir "C:\Program Files (x86)\NTP\logs\" # directory for statistics files
filegen peerstats file peerstats type day enable
filegen loopstats file loopstats type day enable
filegen clockstats file clockstats type day enable
logfile "C:\Program Files (x86)\NTP\logs\syslog.txt"
# Use specific NTP servers
server *.*.*.25 minpoll 4 maxpoll 7 iburst
server *.*.*.26 minpoll 4 maxpoll 7 iburst
server *.*.*.27 minpoll 4 maxpoll 7 iburst
server *.*.*.28 minpoll 4 maxpoll 7 iburst回答 2
Server Fault用户
回答已采纳
发布于 2014-07-31 06:35:18
无法取代董事会。修改配置以频繁轮询，这很有帮助。
Server Fault用户
发布于 2014-05-29 00:46:59
您是正确的，当您硬编码maxpoll 7时，最大轮询间隔永远不会超过128。请随意提交您自己的答案，但无论哪种方式，请关闭此问题。
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原文链接：
https://serverfault.com/questions/599052
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