Re: [gentoo-cluster] Using high availability cluster ?

[Jan Klopper]

Benjamin MALYNOVYTCH wrote:

>**********************************
>JK> Maybe you can just use two A records in your dns.
>
>JK> Both point to one server, and both servers keep an eye on the other with
>JK> hearthbeat,
>
>JK> As soon as one of the servers gets unresponsive the other claims the ip
>JK> as a secundary ip.
>
>JK> ifconfig eth0 add otherip.
>JK> // not forget to arp for it!
>
>JK> And as soon as the hearthbeat finds the other server to be back online,
>JK> it unsets the ip, and lets the other know that it can add the ip again.
>
>JK> Not so hard, just a couple of shell scripts afaik.
>
>JK> greets
>JK> Jan
>
>**********************************
>
>This sounds pretty good, but the customer is running mysql with data
>changing all day long. That means that I would have two seperate db,
>one on each machine, without being able to merge/keep uptodate those
>dabatases :/
>
>Best regards,
>
>Benjamin MALYNOVYTCH
>
>
>
>
That would be a different problem,

You should check mysql failover and master->slave replication. Mysql 
replication should be handled as a different "project" as its something 
of a bitch to setup reliably.

greets
Jan
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