From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: Git: How to keep multiple bare repos in sync?
Date: Tue, 12 May 2015 21:37:45 -0700
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References: <2015051312090840845945@126.com>
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To: chenxitwo <chenxitwo@126.com>
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In-Reply-To: <2015051312090840845945@126.com> (chenxitwo@126.com's message of
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chenxitwo <chenxitwo@126.com> writes:

> There are three git server(bare repos), but i don't know to solve the
> problem that how to keep these git servers in sync.

rsync?

The problem is under-specified.  Is there one of them that is
authoritative and that the other ones should match its progress?
If so, perhaps push from the authoritative one to the other two
with "push --mirror" (or have the other ones "fetch --mirror")?

If you are allowing people to push into any of them randomly,
then there is no general solution.  If I push an update to 'master'
of instance A while you update the same 'master' branch of instance
B, somebody has to reconcile the divergence between the two by
creating a merge, and that can possibly conflict, needing human
intervention to resolve.