[Rails] hope RAILS COMMUNITY MEMBERS help me solve this SIMPLE PROBLEM

hi 

i am new to rails help me to solve this simple problem, i'm using default sqlite db in rails....i want to work and use oracle database now for upcomming rails application here is my ruby and rails version 

rails 3.2.1

ruby1.9.3 

and i tried connecting rails3 with oracle 8i but i could not connect...did rails3 and ruby 1.9 environment supports oracle 8i or whether i have to go for the oracle version like 10g and above. kindly tell me what are the things i need to download,packages and gems needed in order to configure oracle in rails and give me the step by step instruction to do the same.

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