MYSQL Question "Database Location"

[Sambit Nanda <sambitnanda yahoo com>]

I want to keep Multi instance of DB and log in
different file system, I know i can keep or configure 
multi my.cnf but i am not sure how to configure that,
and what should i define for different datadir and
err-log. i am very much new to MYSQL. Can any one
guide me with  example pls.

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Thanks, 

Sambit Nanda 
203-553-3424 (O)