Hi,

I'm not sure if I understand you but you can't have the datadir/database 
filesystem monted read-write on the two servers at the same time. At 
least not with consistensy. Perhaps with innodb on raw devices?

/Jörgen

CyberSushi wrote:

>Hi,
>
>I've got 2 mysql server that I want to configure in a hot-standby config in
>the following manner:
>
>Two servers with a fibre channel connection to a central storage array. The
>data dir of the database is on this
>storage array. The OS (linux or solaris, haven't decided yet) sees this
>datadir as a normal part of its filesystem.
>
>The two servers are both connected to a layer 7 switch that can do
>loadbalancing and hotstandby switching. I'd like to configure the switch to
>do the last. The switch makes use of a virtual IP address an to this VIP a
>pool of real addresses is asigned. The switch is configured to 'route' all
>traffic on port 3306 via a primary path. In case of failure in this path
>(for instance by crashing of the mysqld) the switch wil start using the
>secondary path. This setup is completely transparant for the mysql client,
>because the client is communicating with the VIP of the switch. I'd like to
>use this setup because a master/slave config is too slow in case of failover
>for our situation (we need a very fast failover config).
>
>Now I'd like to know the following:
>
>Can two mysqld's use the same datadir/database (remember they are not
>writing to the same database at the same time!)?
>Which OS will support this best in terms of filelocking etc. Linux or
>Solaris (the fibre channel adapters are well supported in both OSes).
>Any other views on this type of setup.
>
>
>Regards,
>
>Danny
>
>
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