Creating Archiving database for old data in MySQL I Have a Master and Various Slave Servers.

There is a huge amount of the data on all the servers and I wish to create an Archiving system for our Data.

Scenario is :
I want that only Last one year data to be on the servers and all other previous data to be move to archiving system.

Most of the tables are InnoDB and there may also be referential integrity between the tables. (When I purge/Delete the old data from the Servers, which i have moved to the Archive the referential integrity also may fail).

Since I have this data in the Production Servers, what steps should I take to accomplish this with no downtime?
I would suggest looking at the pt-archiver tool in Percona Toolkit.