<br><br><div class="gmail_quote">On Sun, Oct 28, 2012 at 8:28 PM, <span dir="ltr"><<a href="mailto:exarkun@twistedmatrix.com" target="_blank">exarkun@twistedmatrix.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5">On 05:57 am, <a href="mailto:dynamicgl@gmail.com">dynamicgl@gmail.com</a> wrote:<br>
>Hi All<br>
><br>
> I am quite concerned the ticket 2424 due to our system use<br>
>reactor.callLater almost anywhere. I know this issue is hard to be<br>
>finxed<br>
>otherwise It wouldn't exist for such a long time. So any work around<br>
>before<br>
>we getting fix it? The only way I can do is to disable NTP or stop<br>
>process,<br>
>sync the time manually and then restart the process. The latter way is<br>
>hard<br>
>to be accepted due to we have many machines.<br>
<br>
</div></div>NTP does not cause problems with scheduling. NTP gradually slews the<br>
system clock - it does not introduce discontinuities (either forward or<br>
backward), it changes the rate at which time passes until the system<br>
clock agrees with the external clock.<br>
<br>
If you have systems configured to have their system clocks jump<br>
(`ntpdate` is sometimes used for this), fix them to not be configured<br>
this way.<br>
<br>
#2424 is primarily about user-initiated events, primarily on desktop<br>
machines - a user changing the system time, a user suspending the<br>
machine (and later unsuspending it). There's little or no reason for<br>
problems related to #2424 to ever come up on a properly maintained<br>
server.<br>
<br>
Jean-Paul<br>
<br>
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<a href="http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python" target="_blank">http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python</a></blockquote><div><br></div><div>Hi Jean-Paul</div><div><br></div>
<div> Thanks for your answer. It is much clearer from now.</div><div><br></div><div>Regards</div><div><br></div><div>gelin yan </div></div><br>