Base for the test. How to update correctly?

Question

MySQL

There is a production base with a large amount of data. MySQL 5.2.7. Bases inside more than one. It is desirable to have a limited copy of the database on another machine for the tasks of testing and debugging applications. Questions:

1. The production base stores a fairly large amount of data, the increase is also significant. The full amount of data for the test is not required. If you set up a master-slave replication, is it possible to delete obsolete data on the slave using cron?
   
2. If it is impossible to delete from the slave, what is the best way to implement what you want?
   

Answer 1

Cannot be removed from the slave.

Answer 2

Why would you link one to the other?
The database for the test is a set of fixtures.
A database for local development and viewing - can also be made in the form of fixtures.