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From Michael Segel <michael_se...@hotmail.com>
Subject Re: Replication terminology "master-master"
Date Thu, 27 Nov 2014 12:50:35 GMT
master - master? 

Do you mean active - active ? 

replace master and slave with active and passive. 

On Nov 25, 2014, at 3:26 AM, Misty Stanley-Jones <mstanleyjones@cloudera.com> wrote:

> Hi all,
> I think "master-master" is a term that should be re-thought. It is not
> really a "type" of replication, but refers to a characteristic of  a
> cluster, specifically a cluster which participates in multiple clusters
> with different roles -- it is a slave in one cluster and a master in
> another cluster. I think with the current terminology, people confuse it
> with "cyclical" replication, in which two clusters replicate to each other,
> and eventually each has all the data from both.
> Since master-master in this sense is really not a type of replication, I
> think we should just scrap it. You can have master-slave replication or
> cyclical replication, or a combination. With master-slave replication, a
> cluster can fulfill both roles at the same time, as long as it is in
> different clusters. This is easy to understand as a sort of recursive
> cascade.
> Am I explaining it right, and what do you guys think about changing our
> terminology?
> Thanks,
> Misty

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