Marcus, I agree with you too, but have cases you can do it.
2011/9/21 Marcus Bointon <marcus@stripped>
> On 21 Sep 2011, at 20:39, Wagner Bianchi wrote:
> > A good solution could be to use a MASTER <=> MASTER topology, using MySQL
> > 5.1 or 5.5, in order to split writes between servers, operation will
> > decrease a little more your workload.
> I really wouldn't do that. Writing to both masters will not gain you any
> performance and asks for all kinds of split-brain trouble. I've been there,
> it's not pretty. If you manage your masters with MMM, you won't be able to
> do it anyway as it sets passive masters to read-only.
> It's been said many times - MySQL replication is NOT a scaling solution.
> MySQL Cluster and sharding are scaling solutions, but they are unrelated to
> Marcus Bointon
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