61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
/* -*- Mode: Text -*- */
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AutoGen Definitions perlopt;
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#include autogen-version.def
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prog-name = calc_tickadj;
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prog-title = 'Calculates "optimal" value for tick given ntp drift file.';
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package = ntp;
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#include version.def
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long-opts;
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gnu-usage;
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flag = {
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name = drift-file;
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value = d;
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arg-type = string;
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arg-default = '/etc/ntp/drift';
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descrip = 'Ntp drift file to use';
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doc = 'Use the specified drift file for calculations';
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};
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flag = {
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name = tick;
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value = t;
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arg-type = number;
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descrip = 'Tick value of this host';
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doc = 'The current tick which to adjustment will be calculated';
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};
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doc-section = {
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ds-type = 'DESCRIPTION';
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ds-format = 'texi';
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ds-text = <<- _EndOfDoc
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The @code{calc_tickadj} script uses provided ntp drift file to generate optimal
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tick value. Generally, ntpd can do better job if the drift value is the
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smallest possible number.
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The example output of
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@example
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$ ./calc_tickadj
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81.699 (drift)
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9999 usec; 9999779 nsec
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$ cat /etc/ntp/drift
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-23.159
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@end example
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means the following. If tick on that box is 10,000, by making the value 9999
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we'll shift the box from its current drift of -23.159 to a drift of 81.699, and
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in doing so we'll speed the clock up a little every second instead of slowing
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the clock down a little.
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If 'tick' on that box is 10,000,000 then by setting it to 9999779 the drift
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value will be somewhere around 0.0.
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@code{calc_tickadj} tries to determine the the tick value by using
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@code{tickadj} program from ntp package. If this doesn't work you can specify
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current tick manually on command line.
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_EndOfDoc;
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};
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