Lines Matching +full:active +full:- +full:interval +full:- +full:ms
4 .\" EDIT THIS FILE WITH CAUTION (ntpd-opts.mdoc)
6 .\" It has been AutoGen-ed May 25, 2024 at 12:03:54 AM by AutoGen 5.18.16
7 .\" From the definitions ntpd-opts.def
8 .\" and the template file agmdoc-cmd.tpl
17 .Op Fl \-option\-name Ns Oo Oo Ns "=| " Oc Ns Ar value Oc
27 Network Time Protocol (NTP) version 4, as defined by RFC\-5905,
29 version 3, as defined by RFC\-1305, and versions 1
30 and 2, as defined by RFC\-1059 and RFC\-1119, respectively.
34 utility does most computations in 64\-bit floating point
35 arithmetic and does relatively clumsy 64\-bit fixed point operations
90 .Bl -tag
91 .It Fl 4 , Fl \-ipv4
98 .It Fl 6 , Fl \-ipv6
105 .It Fl a , Fl \-authreq
113 .It Fl A , Fl \-authnoreq
121 .It Fl b , Fl \-bcastsync
124 .It Fl c Ar string , Fl \-configfile Ns = Ns Ar string
130 .It Fl d , Fl \-debug\-level
134 .It Fl D Ar number , Fl \-set\-debug\-level Ns = Ns Ar number
139 .It Fl f Ar string , Fl \-driftfile Ns = Ns Ar string
150 .It Fl g , Fl \-panicgate
159 \fB\-q\fP
161 \fB\-x\fP
166 .It Fl G , Fl \-force\-step\-once
172 which is 128 ms by default, and otherwise slews the time.
179 .It Fl i Ar string , Fl \-jaildir Ns = Ns Ar string
187 \fB\-u\fP
192 \fB\-\-enable\-clockctl\fP) or Linux (configure with
193 \fB\-\-enable\-linuxcaps\fP) or Solaris (configure with \fB\-\-enable\-solarisprivs\fP).
194 .It Fl I Ar iface , Fl \-interface Ns = Ns Ar iface
203 .It Fl k Ar string , Fl \-keyfile Ns = Ns Ar string
212 .It Fl l Ar string , Fl \-logfile Ns = Ns Ar string
220 .It Fl L , Fl \-novirtualips
227 .It Fl M , Fl \-modifymmtimer
233 .It Fl n , Fl \-nofork
236 wait\-sync.
238 .It Fl N , Fl \-nice
244 .It Fl p Ar string , Fl \-pidfile Ns = Ns Ar string
253 .It Fl P Ar number , Fl \-priority Ns = Ns Ar number
262 .It Fl q , Fl \-quit
265 saveconfigquit, wait\-sync.
273 \fB\-g\fP
275 \fB\-x\fP
278 .It Fl r Ar string , Fl \-propagationdelay Ns = Ns Ar string
282 .It Fl \-saveconfigquit Ns = Ns Ar string
285 quit, wait\-sync.
290 .It Fl s Ar string , Fl \-statsdir Ns = Ns Ar string
297 .It Fl t Ar tkey , Fl \-trustedkey Ns = Ns Ar tkey
302 .It Fl u Ar string , Fl \-user Ns = Ns Ar string
309 \fB\-\-enable\-clockctl\fP) or Linux (configure with
310 \fB\-\-enable\-linuxcaps\fP) or Solaris (configure with \fB\-\-enable\-solarisprivs\fP).
311 .It Fl U Ar number , Fl \-updateinterval Ns = Ns Ar number
312 interval in seconds between scans for new or dropped interfaces.
319 .It Fl \-var Ns = Ns Ar nvar
323 .It Fl \-dvar Ns = Ns Ar ndvar
327 .It Fl w Ar number , Fl \-wait\-sync Ns = Ns Ar number
341 .It Fl x , Fl \-slew
344 Normally, the time is slewed if the offset is less than the step threshold, which is 128 ms by default, and stepped if above the threshold.
346 Note: Since the slew rate of typical Unix kernels is limited to 0.5 ms/s, each second of adjustment requires an amortization interval of 2000 s.
349 \fB\-g\fP
351 \fB\-q\fP
357 .It Fl \-usepcc
364 .It Fl \-pccfreq Ns = Ns Ar string
370 .It Fl m , Fl \-mdns
375 .It Fl \&? , Fl \-help
377 .It Fl \&! , Fl \-more\-help
379 .It Fl \-version Op Brq Ar v|c|n
388 \fBNTPD_<option\-name>\fP or \fBNTPD\fP
403 from bursts, the initial poll interval for each server is delayed
404 an interval randomized over a few seconds.
406 interval of 64s, several minutes can elapse before the clock is
418 time\-of\-year (TOY) chip to maintain the time during periods when
458 the synchronization distance, which is equal to one\-half the
462 algorithms discard sample offsets exceeding 128 ms,
463 unless the interval during which no sample offset is less than 128
464 ms exceeds 900s.
472 very rarely strays more than 128 ms even under extreme cases of
478 the error might grow to exceed 128 ms,
494 to 500 parts\-per\-million (PPM) as a consequence of the correctness
500 During this interval the
507 outside the 128\-ms range and an eventual step or slew time
564 will effectively "warm\-start" and your system's clock will
585 monotonically\-increasing time,
587 .Xr ntp\-wait 1ntp\-waitmdoc
593 .Xr ntp\-wait 1ntp\-waitmdoc
632 symmetric active/passive, client/server broadcast/multicast and
642 However, it can operate in a one\-time
647 compute server\-client propagation delay correction factors and
660 and determines the best poll interval using a heuristic algorithm.
667 unreachable for some time, the poll interval is increased in steps
724 stopped and run in one\-time mode as required.
728 .Ss "Poll Interval Control"
733 accuracy by reducing the interval or to reduce network overhead by
748 will not operate properly if the poll interval is less than 64 s
753 useful to increase the minimum interval to a few tens of minutes
754 and maximum interval to a day or so.
757 interval will be increased in steps from the minimum to the
762 range of the loop is 500 PPM at an interval of 64s decreasing by a
763 factor of two for each doubling of interval.
775 .Ss "The huff\-n'\-puff Filter"
786 The huff\-n'\-puff filter is designed to correct the apparent time
794 interval measured usually in hours.
812 .Bl -tag -width /etc/ntp.drift -compact
822 .Bl -tag
829 it to autogen\-users@lists.sourceforge.net. Thank you.
889 Copyright (C) 1992\-2024 The University of Delaware and Network Time Foundation all rights reserved.
896 larger than might be desirable for an elevated\-priority
907 This manual page was \fIAutoGen\fP\-erated from the \fBntpd\fP