Re: 2 odf 3 nodes down

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On 02/12/2013 01:54 PM, SZÉKELYI Szabolcs wrote:

> I'm not a Ceph expert, but I don't think so. Quorum is an essential feature of 
> clusters to prevent split-brain situations. Even if it was possible, you 
> really should not do that otherwise you may end up losing data in case a real 
> split-brain occurs.

So I have a ceph cluster of 4 nodes on separate sites (two nodes each
site, 1 mon on site A, 2 mons on site B). crush-maps make sure that data
stays site-local. If the sites are split (brained) through the WAN line,
that means my monitors are divided by half, and site A would stop
working? This should _not_ happen. A Split-Brain in this case wouldn't
hurt, because as I said, all the data is staying site-local.
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