Hey, at this point I think Sentinel is considered Stable by the Redis community. It is relatively new code, but the second incarnation uses better algorithms and was applied in a number of production environments.
What we recommend currently is just to test it in your specific environment, and to understand the way it works. The weak thing currently, to be honest, is the documentation, but I'm working at it.
Hey, thanks for your comment and all the work you put in Redis!
I talked to my co workers, and we agreed to put some more time into researching and giving sentinel a shot. You are right about the documentation though.. It isn't very clear and that is probably one of the reasons why we didn't go for it right away.
What we recommend currently is just to test it in your specific environment, and to understand the way it works. The weak thing currently, to be honest, is the documentation, but I'm working at it.