Doug Stewart on 11 Dec 2010 22:03:23 -0800

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Re: [PLUG] 3-way data mirror?

On Sun, Dec 12, 2010 at 12:52 AM, JP Vossen <> wrote:
> I have a situation where I have 2 labs that need to keep ~150G of data in
> sync, but they can't talk to each other.  They can talk to a 3rd machine,
> which is also backed up, so...
> What I think I'd like to do is have:
>        Lab1 <--> COLO <--> Lab2
> The problem is that lab1 and lab2 are both read-write, so there is a real
> possibility of stepping on changes.  COLO is read-only.
> I'd try to just relay through the COLO, but that's also where the backup
> will happen.  And I can't get the FW rules changed.
> Any better ideas?
> Any suggestions on tools?  I'd strongly prefer something already in the
> CentOS-5 or EPEL repos.

Have you looked into Unison?

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