(sorry for my english)

hello people:

i want to answer if do exists any mysql solution that implements load balancer and redundancy between 'application layer' and 'mysqld layer'

i will try to explain me:

i want to implement a completed mysql cluster system, and the documentation is very good, but i see a problem:

we need to look the picture in this page:
http://dev.mysql.com/doc/mysql/en/mysql-cluster-overview.html

in this picture we can see that the 'storage layer' implements correctly redundance and load balancer feature, because the 'SQL layer' ask for data to a 'storage layer' but not to a one particular node.

but the applications in the 'application layer' do the petitions to the 'SQL layer' directly to a particular node, and them:

what happen if a node in the 'SQL layer' is off?
how i can offer a load balancer feature between 'application layer' and 'SQL layer'.

i searched a lot on the web but i only founded out answers but not solutions..

i also see this thread in this mail list:
http://lists.mysql.com/search.php?q=load+balancer&list=&m=a&begin=60
but i did not found an answer in this thread.

any help?

thanks a lot

fernando guillen (aka d2clon)


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