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Re: Multiple MySQL instances talking to the same SAN
Posted by: Michael Wallace
Date: April 06, 2008 11:43AM

It's entirely possible, but for HA, it's not a good idea. If your San/switch/etc fails, you've introduced a huge single point of failure. Of course the redundancy inherent in the SAN matters. If it's been designed for redundancy - ie: multiple shelves with RAIDSets balanced across them, multiple service processors, multiple fibre switches, etc, you're in far better shape than you would be without all of that.

If the cost of additional SANs is a concern, but performance is not, consider multiple stand-alone servers with RAIDed local disks in a failover configuration. If that doesn't provide sufficient speed, there are plenty of inexpensive jbod devices out there to attach to said servers.

If you're on a SAN to begin with for performance reasons, consider buying another one.

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Re: Multiple MySQL instances talking to the same SAN
April 06, 2008 11:43AM


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