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In a MySQL master-slave replication enviroment if I have 4 slave servers how can I execute load balanced select queries?
Should I write a PHP class to dealing with the 4 slaves or it is possible to address queries to MySQL’s own load balancer solution? Is there any MySQL load balancing solution?
Can I use some other tool to distribute my queries? What is the typical set up in situations like this?
Thanks for all answers!
Common practice would be to set up something like ldirectord in front of your mysql cluster to provide a virtual ip as a load balanced address for the cluster, this could then distribute your queries to the various mysql servers.
This would require ipvs routing which may/may not be overkill for your specific situation, it may be that php control of the load balancing would be appropriate for what you are trying to achieve.