|Re: [chrony-users] Which command is better to force chrony to synchronize time right now -- chronyc burst or chronyc waitsync?|
[ Thread Index |
| More chrony.tuxfamily.org/chrony-users Archives
- To: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Subject: Re: [chrony-users] Which command is better to force chrony to synchronize time right now -- chronyc burst or chronyc waitsync?
- From: Rufe Glick <rufe.glick@xxxxxxxxx>
- Date: Thu, 23 Oct 2014 20:37:06 -0400
- Cc: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:message-id:to:cc:subject:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=ul9676KY3xGWgfmpTf7LdeMq3roBDI5xV+/TPDKIItI=; b=cGB+UzaSSr3DHfHxSe3HjgSIN4LXwq3ZGvcpYaT+2QvNuJ8mQP8q9iL2mILwTSrCfn MzyZmGaRj59a3RQ1xYDr/92xI6xLZbbL2sPbWgf1WV6kqlHcANc++CkVcfY9YKTRgqhc Drikjot/8Hv0f0fieG1MUTHTFif8A3Gc+gXcbtoqOFbCPolEdiCohPlM8EaDMQOCiQBQ BGSBbUPl6zI8NizGj6M0kpVBDffkF9WA9HzrWJwOHb4gvBONqbC6ODIVVIxfSJ3Dixia tIq6X5gFhhZVOsSTpXJ/KjmZy0N46pMJ0azuFo5UY/bvTjq6t5Va2VVpgj+Pjd3ozSBD g86Q==
Wednesday, October 22, 2014, 7:21:27 AM, you wrote:
> On Tue, Oct 21, 2014 at 03:34:39PM -0400, Rufe Glick wrote:
>> I am looking for an equivalent of 'ntpdate pool.ntp.org' command
>> in the chrony suite to force chronyd to synchronize time right now.
>> On the internet I found suggestions to either use 'chronyc -a 1/4 burst'
>> or 'chronyc waitsync'. Which one is better for the purpose? After
>> reading the manual I guess that waitsync is better. Please confirm,
>> refute or recommend something else.
> The waitsync command just waits until the clock is synchronized within
> certain limits, it doesn't tell chronyd to make new measurements
> immediately or anything like that. It's mainly useful to block
> starting services on boot, so they don't observe any jumps in time.
> If chronyd isn't already running, a command similar to 'ntpdate
> pool.ntp.org' could be (since version 1.30):
> chronyd -q 'server pool.ntp.org iburst'
> If it's already running and it has some servers configured, an
> equivalent would be:
> chronyc -a 'burst 4/4'
> If you want chronyd to also step the clock instead of slewing if there
> is a larger offset and chrony.conf doesn't include an unlimited makestep
> directive, you will also need to wait until the new measurements are
> made and then tell chronyd to make the step:
> sleep 10
> chronyc -a makestep
> Is this what you are looking for?
Yes, that seems to be what I was looking for.
One follow up question. Why do you suggest to call 'sleep 10' before
'chronyc -a makestep'? What does it do?
To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
with "unsubscribe" in the subject.
For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
with "help" in the subject.
Trouble? Email listmaster@xxxxxxxxxxxxxxxxxxxx.