How to test multiple redis source?
1) Swap dump.rdb with source .rdb
2) Load redis server
Or if you too lazy to swap, set each source to a different database (redis server has 16 selectable databases by default). It's as simple as changing a single number in the source.
Sorry, couldn't help myself with this shameless plug. Learning how to work with redis is a worthwhile endeavor. 10 million times better than sql.