define tables for storing repository info

[letusfly85]

Summary

to store repository info, there is a need to define table definitions

changelog

• decide to use ets .
• should have notified status.

added todos

• know how to access ets
• define erd
• create erd wiki

wikis

• data structure

related issues

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• #14 [module]store repository info to riak

parent issue

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others

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refs

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http://elixir-lang.org/getting-started/mix-otp/ets.html