Re: Does mon skew really matters?

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On Sat, 4 Jun 2016, Wei Jin wrote:
> In my opinion, if clock drift is too heavy, the lease protocol inside
> paxos won't work. Lease may be timeout and then triggers monitor to
> bootstrap.

Exactly.

> You could try to shift clock back on the leader node to see what will happen.
> 
> Time check mechanism gives us warning message so that we may take
> actions if possible before things getting worse.

You can also get into situations where the clients loop trying to get a 
new ticket because the one they are issued appears to be expired.

sage

> 
> On Sat, Jun 4, 2016 at 12:06 PM, Ning Yao <zay11022@xxxxxxxxx> wrote:
> > Hi, all
> >
> > I find that even if I have mon clock skew warning, under most cases,
> > my cluster still can work properly as expected.
> >
> > I go through the code in mon but do not find any related issue without
> > time_check() to update whether clock skew periodically.
> >
> > can any one tell what is the design purpose of the clock skew between
> > mon and when it will really matter the cluster?
> >
> > Thanks a lots!
> >
> > Regards
> > Ning Yao
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