Thanks Frédéric!  So what you're saying is that the current DNS based
method for selecting a server is round robin, correct?


On Jan 20, 12:16 am, Frédéric Sidler <[email protected]>
wrote:
> Neither scalr, not mysql-proxy, nor sqlrelay can propose you to send your
> request to the less loaded mysql server.
> If you find the "graal", tell me. I'm interested too. But I never found any
> other solution than the Round Robin mode.
>
> On Wed, Jan 20, 2010 at 5:07 AM, Robert <[email protected]> wrote:
> > I was asked a question today that I think I know the answer to, but I
> > need to confirm and I can't seem to find it written out anywhere.
>
> > If we have a farm with N MySQL slave instances, how do we select which
> > instance to open the connection to? For example when I'm going to do a
> > read I need to connect to a slave, but which one?  Ideally we'd like
> > to select the most lightly loaded instance.
>
> > I think the answer is that using the domain name for instances of that
> > role will randomly (or maybe round-robin) select an instance of that
> > role. That doesn't guarantee that the instance we select will be the
> > lightest loaded instance, but in general all instances will be loaded
> > to about the same level.
>
> > Is that correct? If not, please clarify.
>
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