We'll respond shortly.
We want to set up our database in a master-slave setup and would like to know what gem is currently recommended.
Answer according to Palermo: Don’t use MySQL master-slave
Our client wants to run Redis with a Master/Slave setup. Has anyone ever done this? What experiences did you make?
Answer according to Davis:
There are 2 options, Redis Cluster which is complete vaporware and Redis Sentinel which is recently released. TLDR: Redis Sentinel
MySQL in the Google Cloud – Now you can use Google App Engine without being stuck with a key-value data store.