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Re: mysql clustering
Posted by: Sam Weiss
Date: August 04, 2005 01:14AM

Stewart Smith wrote:
> No, it's not possible.
>
> Cut the network cable.
>
> Now, who is the database?
>
> How does machine A know it's a network fault and
> not that machine B is down?
>
> How does machine B know it's a network fault and
> not that machine A is down?

How is this different from the case where you have 3 machines and the dedicated switch linking them goes down? If you lose the network over which the cluster is communicating (as opposed to the public network that connects clients to the cluster), none of the cluser nodes can reach the arbitrator anyway and you still have the split brain scenario. So unless you have redundant switches and network connections for the private cluster communications, the network itself introduces a single point of failure no matter how many machines you have in your cluster. What am I missing?

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